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143 vulnerabilities
CVE-2026-42389 (GCVE-0-2026-42389)
Vulnerability from cvelistv5 – Published: 2026-06-25 13:16 – Updated: 2026-06-25 14:58
VLAI?
Title
Reject more queries with invalid header values
Summary
This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.
Severity ?
5.3 (Medium)
CWE
- Improper Input Validation
Assigner
References
Credits
Xiang Li, Mingming Zhang, Fasheng Miao, Zuyao Xu from AOSP Lab, Nankai University, Zhongguancun Lab, Tsinghua University
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CVE-2026-52690 (GCVE-0-2026-52690)
Vulnerability from cvelistv5 – Published: 2026-06-25 13:01 – Updated: 2026-06-25 14:21
VLAI?
Title
Spoofed answers can mark an authoritative non-EDNS capable
Summary
Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.
Severity ?
5.9 (Medium)
CWE
- Authentication Bypass by Spoofing
Assigner
References
Impacted products
Credits
Mehtab Zafar
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CVE-2026-42390 (GCVE-0-2026-42390)
Vulnerability from cvelistv5 – Published: 2026-06-25 13:01 – Updated: 2026-06-25 14:25
VLAI?
Title
ZONEMD validation can be bypassed
Summary
An invalid zone might pass ZONEMD validation while it should not. This is only relevant if ZoneToCache is configured with ZONEMD validation.
Severity ?
5.3 (Medium)
CWE
- Improper Input Validation
Assigner
References
Credits
Vitaly Simonovich
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CVE-2026-42388 (GCVE-0-2026-42388)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:59 – Updated: 2026-06-25 14:42
VLAI?
Title
Missing input validation for catalog zones
Summary
Incomplete validation of the SOA record present in a catalog zone might lead to a crash.
Severity ?
5.9 (Medium)
CWE
- Improper Input Validation
Assigner
References
Impacted products
Credits
ylwango613
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CVE-2026-42387 (GCVE-0-2026-42387)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:59 – Updated: 2026-06-25 14:41
VLAI?
Title
Insufficient input validation in ZoneToCache
Summary
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.
Severity ?
5.9 (Medium)
CWE
- Improper Input Validation
Assigner
References
Impacted products
Credits
nurmukhammyed
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CVE-2026-40012 (GCVE-0-2026-40012)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:58 – Updated: 2026-06-25 14:41
VLAI?
Title
Information about ECS zero scoped answers might leak to clients that use a specific ECS
Summary
ECS zero scoped answers are stored in the packet cache while they should not. This impacts only configurations that have ECS enabled;
Severity ?
5.3 (Medium)
CWE
- Exposure of Resource to Wrong Sphere
Assigner
References
Impacted products
Credits
Danial Mahadzir
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CVE-2026-33612 (GCVE-0-2026-33612)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:58 – Updated: 2026-06-25 13:35
VLAI?
Title
ZoneToCache can poison the cache
Summary
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning.
Severity ?
7.5 (High)
CWE
- Acceptance of Extraneous Untrusted Data With Trusted Data
Assigner
References
Impacted products
Credits
Danial Mahadzir
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CVE-2026-42004 (GCVE-0-2026-42004)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:24 – Updated: 2026-06-25 13:44
VLAI?
Title
EDNS options smuggling
Summary
An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.
Severity ?
CWE
- Misinterpretation of Input
Assigner
References
Impacted products
Credits
Vitaly Simonovich
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CVE-2026-40211 (GCVE-0-2026-40211)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:23 – Updated: 2026-06-25 13:45
VLAI?
Title
Denial of service via crafted DoH3 queries
Summary
An attacker can send crafted DNS over HTTP/3 queries, triggering an exception that prevents some buffer from being freed right away. The buffer will be freed at the end of the QUIC connection, but on some setups it might be possible to open enough concurrent DoH3 streams to trigger an out-of-memory condition, resulting in a denial of service.
Severity ?
5.3 (Medium)
CWE
- Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Credits
Mehtab Zafar
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CVE-2026-40210 (GCVE-0-2026-40210)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:23 – Updated: 2026-06-25 13:49
VLAI?
Title
Out-of-bounds read in SetMacAddrAction
Summary
An out-of-bounds read might happen when SetMacAddrAction is used, potentially resulting in uninitialized memory being sent over the network or a crash.
Severity ?
4.8 (Medium)
CWE
- Buffer Over-read
Assigner
References
Impacted products
Credits
Qifan Zhang (Palo Alto Networks)
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CVE-2026-40209 (GCVE-0-2026-40209)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:23 – Updated: 2026-06-25 13:56
VLAI?
Title
Denial of service via IXFR queries
Summary
An attacker might be able to cause outgoing TCP connections to backend to be stuck until a timeout occurs instead of being released immediately, by sending IXFR queries. This could be used to cause a denial of service if there is a limit to the number of concurrent connections to this backend, or if the process runs out of file descriptors.
Severity ?
5.3 (Medium)
CWE
- Missing Release of Resource after Effective Lifetime
Assigner
References
Impacted products
Credits
Qifan Zhang (Palo Alto Networks)
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CVE-2026-40208 (GCVE-0-2026-40208)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:22 – Updated: 2026-06-25 13:24
VLAI?
Title
Denial of service via DoH3 queries
Summary
An attacker might be able to delay the processing of DoH3 queries by sending DoH3 GET queries with an invalid DATA frame.
Severity ?
CWE
- Incorrect Control Flow Scoping
Assigner
References
Impacted products
Credits
ylwango613
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CVE-2026-40011 (GCVE-0-2026-40011)
Vulnerability from cvelistv5 – Published: 2026-06-25 12:22 – Updated: 2026-06-25 13:23
VLAI?
Title
Prometheus denial of service via crafted DNS queries
Summary
An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted with a value causing invalid output to be produced in the prometheus endpoint. The prometheus endpoint will then be rejected by the scraper until the dynamic block expires.
Severity ?
CWE
- Improper Encoding or Escaping of Output
Assigner
References
Impacted products
Credits
Haruki Oyama (Waseda University)
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CVE-2026-42005 (GCVE-0-2026-42005)
Vulnerability from cvelistv5 – Published: 2026-06-25 11:57 – Updated: 2026-06-25 13:04
VLAI?
Title
Insufficient input validation of internal web server
Summary
An attacker can send a web request that causes unlimited memory
allocation in the internal web server, leading to a denial of service.
The internal web server is disabled by default.
Severity ?
4.3 (Medium)
CWE
- Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
4.9.0 , < 4.9.16
(semver)
Affected: 5.0.0 , < 5.0.6 (semver) Affected: 5.1.0 , < 5.1.2 (semver) |
Credits
ilya rozentsvaig
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CVE-2026-41999 (GCVE-0-2026-41999)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:27 – Updated: 2026-05-21 11:58
VLAI?
Title
Incorrect Behaviour of Views with TCP PROXY Requests
Summary
Incorrect Behaviour of Views with TCP PROXY Requests
Severity ?
4.8 (Medium)
CWE
- Improper Access Control
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
5.0.0 , < 5.0.5
(semver)
|
Credits
Zwique
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CVE-2026-42002 (GCVE-0-2026-42002)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:27 – Updated: 2026-05-21 11:59
VLAI?
Title
Concurrency and locking defects in GSS-TSIG
Summary
Concurrency and locking defects in GSS-TSIG
Severity ?
5.9 (Medium)
CWE
- Signal Handler Race Condition
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
4.9.0 , < 4.9.15
(semver)
Affected: 5.0.0 , < 5.0.5 (semver) |
Credits
thanos_haruki
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CVE-2026-42001 (GCVE-0-2026-42001)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:26 – Updated: 2026-05-21 12:01
VLAI?
Title
Insufficient Validation of Autoprimary SOA Queries
Summary
Insufficient Validation of Autoprimary SOA Queries
Severity ?
7.5 (High)
CWE
- Uncontrolled Resource Consumption
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
4.9.0 , < 4.9.15
(semver)
Affected: 5.0.0 , < 5.0.5 (semver) |
Credits
lazarux0x1337
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CVE-2026-42000 (GCVE-0-2026-42000)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:25 – Updated: 2026-05-21 12:02
VLAI?
Title
Insufficient Validation of Names During AXFR
Summary
Insufficient Validation of Names During AXFR
Severity ?
6.8 (Medium)
CWE
- Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
4.9.0 , < 4.9.15
(semver)
Affected: 5.0.0 , < 5.0.5 (semver) |
Credits
ilhamaf
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CVE-2026-42396 (GCVE-0-2026-42396)
Vulnerability from cvelistv5 – Published: 2026-05-21 09:25 – Updated: 2026-05-21 12:03
VLAI?
Title
Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail
Summary
Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail
Severity ?
4.9 (Medium)
CWE
- Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
4.9.0 , < 4.9.15
(semver)
Affected: 5.0.0 , < 5.0.5 (semver) |
Credits
ilhamaf
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CVE-2026-42006 (GCVE-0-2026-42006)
Vulnerability from cvelistv5 – Published: 2026-05-12 13:28 – Updated: 2026-06-30 12:08
VLAI?
Summary
An attacker can cause uncontrolled memory usage with excessive bracing over IMAP. The fix in CVE-2026-27857 was incomplete, only blocking one way of doing this, so there was still another way left open. In particular, the fix was for closing braces, but you could still use open braces to bypass the limit. Using excessive bracing, attacker can cause memory usage up to configured memory limit. Install fixed version, or configure vsz_limit for imap process to low value. No publicly available exploits are known.
Severity ?
4.3 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro |
Affected:
0 , ≤ 3.0.5
(semver)
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CVE-2026-40020 (GCVE-0-2026-40020)
Vulnerability from cvelistv5 – Published: 2026-05-12 13:28 – Updated: 2026-05-12 15:40
VLAI?
Summary
Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is gained. Install to fixed version. No publicly available exploits are known.
Severity ?
CWE
- CWE-284 - Improper Access Control
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro |
Affected:
0 , ≤ 2.3.0
(semver)
|
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CVE-2026-40016 (GCVE-0-2026-40016)
Vulnerability from cvelistv5 – Published: 2026-05-12 13:28 – Updated: 2026-05-12 15:38
VLAI?
Summary
Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed version, or alternatively prevent direct access to Sieve scripts via ManageSieve or local access. No publicly available exploits are known.
Severity ?
5.3 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro |
Affected:
0 , ≤ 2.3.0
(semver)
|
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CVE-2026-33603 (GCVE-0-2026-33603)
Vulnerability from cvelistv5 – Published: 2026-05-12 13:28 – Updated: 2026-05-12 15:08
VLAI?
Summary
Attacker can use a specially crafted base64 exchange between Dovecot and Client to fake SCRAM TLS channel binding. This requires that the attacker is able to position itself between Dovecot and the client connection. If successful, the attacker can eavesdrop communications between Dovecot and client as MITM proxy. Install fixed version. No publicly available exploits are known.
Severity ?
6.8 (Medium)
CWE
- CWE-99 - Improper Control of Resource Identifiers ('Resource Injection')
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro |
Affected:
0 , ≤ 3.1.0
(semver)
Affected: 0 , ≤ 2.4.0 (semver) |
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CVE-2026-27851 (GCVE-0-2026-27851)
Vulnerability from cvelistv5 – Published: 2026-05-12 13:28 – Updated: 2026-06-30 12:08
VLAI?
Summary
When safe filter is used with variable expansion, all following pipelines on the same string are incorrectly interpreted as safe too, enabling unsafe data to be unescaped. This can enable SQL / LDAP injection attacks when used in authentication. Avoid using safe filter until on fixed version. No publicly available exploits are known.
Severity ?
7.4 (High)
CWE
- CWE-235 - Improper Handling of Extra Parameters
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro |
Affected:
0 , ≤ 3.1.4
(semver)
Affected: 0 , ≤ 2.4.3 (semver) |
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CVE-2026-33611 (GCVE-0-2026-33611)
Vulnerability from cvelistv5 – Published: 2026-04-22 14:01 – Updated: 2026-04-22 14:24
VLAI?
Title
Insufficient validation of HTTPS and SVCB records
Summary
An operator allowed to use the REST API can cause the Authoritative server to produce invalid HTTPS or SVCB record data, which can in turn cause LMDB database corruption, if using the LMDB backend.
Severity ?
6.5 (Medium)
CWE
- Integer Overflow or Wraparound
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
5.0.0 , < 5.0.4
(semver)
Affected: 4.9.0 , < 4.9.14 (semver) |
Credits
Tibs
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CVE-2026-33610 (GCVE-0-2026-33610)
Vulnerability from cvelistv5 – Published: 2026-04-22 14:00 – Updated: 2026-04-22 14:26
VLAI?
Title
Possible file descriptor exhaustion in forward-dnsupdate
Summary
A rogue primary server may cause file descriptor exhaustion and eventually a denial of service, when a PowerDNS secondary server forwards a DNS update request to it.
Severity ?
5.9 (Medium)
CWE
- Uncontrolled Resource Consumption
Assigner
References
Impacted products
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|---|---|---|---|---|
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Affected:
5.0.0 , < 5.0.4
(semver)
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Credits
ylwango613
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CVE-2026-33609 (GCVE-0-2026-33609)
Vulnerability from cvelistv5 – Published: 2026-04-22 14:00 – Updated: 2026-04-22 14:27
VLAI?
Title
LDAP DN injection
Summary
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
Severity ?
5.3 (Medium)
CWE
- Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
5.0.0 , < 5.0.4
(semver)
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Credits
ylwango613
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CVE-2026-33608 (GCVE-0-2026-33608)
Vulnerability from cvelistv5 – Published: 2026-04-22 14:00 – Updated: 2026-04-22 14:28
VLAI?
Title
Incomplete domain name sanitization during
Summary
An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.
Severity ?
7.4 (High)
CWE
- Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| PowerDNS | Authoritative |
Affected:
5.0.0 , < 5.0.4
(semver)
Affected: 4.9.0 , < 4.9.14 (semver) |
Credits
Vitaly Simonovich
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CVE-2026-33593 (GCVE-0-2026-33593)
Vulnerability from cvelistv5 – Published: 2026-04-22 13:48 – Updated: 2026-04-22 14:29
VLAI?
Title
Denial of service via crafted DNSCrypt query
Summary
A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.
Severity ?
7.5 (High)
CWE
- Divide By Zero
Assigner
References
Impacted products
Credits
Haruto Kimura (Stella)
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CVE-2026-33594 (GCVE-0-2026-33594)
Vulnerability from cvelistv5 – Published: 2026-04-22 13:48 – Updated: 2026-04-22 14:36
VLAI?
Title
Outgoing DoH excessive memory allocation
Summary
A client can trigger excessive memory allocation by generating a lot of queries that are routed to an overloaded DoH backend, causing queries to accumulate into a buffer that will not be released until the end of the connection.
Severity ?
5.3 (Medium)
CWE
- Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Credits
Mehtab Zafar
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