Search criteria
5 vulnerabilities by HAProxy
CVE-2026-55204 (GCVE-0-2026-55204)
Vulnerability from cvelistv5 – Published: 2026-06-18 16:05 – Updated: 2026-06-18 17:26 X_Open Source
VLAI?
Title
HAProxy - NULL Pointer Dereference in hpack_dht_insert Function
Summary
HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.
Severity ?
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
Credits
Tristan Madani (@TristanInSec)
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CVE-2026-55203 (GCVE-0-2026-55203)
Vulnerability from cvelistv5 – Published: 2026-06-18 16:05 – Updated: 2026-06-23 02:04 X_Open Source
VLAI?
Title
HAProxy - Integer Overflow in FCGI Demux Record Length Field
Summary
HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure's drl field that allows buffer misparse as new FCGI record headers. When contentLength is 65535 and paddingLength is 1 or more, the drl field wraps to 0, causing incorrect record consumption and allowing malicious FastCGI backends to desynchronize the FCGI framing parser, potentially causing request routing errors, response smuggling, or memory safety issues.
Severity ?
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
Credits
Tristan Madani (@TristanInSec)
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CVE-2026-33555 (GCVE-0-2026-33555)
Vulnerability from cvelistv5 – Published: 2026-04-13 00:00 – Updated: 2026-04-22 18:43
VLAI?
Summary
An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be used for request smuggling. The earliest affected version is 2.6.
Severity ?
4 (Medium)
CWE
- CWE-130 - Improper Handling of Length Parameter Inconsistency
Assigner
References
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CVE-2025-59303 (GCVE-0-2025-59303)
Vulnerability from cvelistv5 – Published: 2025-10-08 00:00 – Updated: 2025-10-08 17:10
VLAI?
Summary
HAProxy Kubernetes Ingress Controller before 3.1.13, when the config-snippets feature flag is used, accepts config snippets from users with create/update permissions. This can result in obtaining an ingress token secret as a response. The fixed versions of HAProxy Enterprise Kubernetes Ingress Controller are 3.0.16-ee1, 1.11.13-ee1, and 1.9.15-ee1.
Severity ?
6.4 (Medium)
CWE
- CWE-791 - Incomplete Filtering of Special Elements
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| HAProxy | HAProxy Kubernetes Ingress Controller |
Affected:
0 , < 3.1.13
(custom)
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CVE-2025-32464 (GCVE-0-2025-32464)
Vulnerability from cvelistv5 – Published: 2025-04-09 00:00 – Updated: 2025-04-23 22:03
VLAI?
Summary
HAProxy 2.2 through 3.1.6, in certain uncommon configurations, has a sample_conv_regsub heap-based buffer overflow because of mishandling of the replacement of multiple short patterns with a longer one.
Severity ?
6.8 (Medium)
CWE
- CWE-1025 - Comparison Using Wrong Factors
Assigner
References
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