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2 vulnerabilities found for liboauth2 by OpenIDC
CVE-2026-54431 (GCVE-0-2026-54431)
Vulnerability from cvelistv5 – Published: 2026-07-02 10:30 – Updated: 2026-07-02 12:16 X_Open Source
VLAI?
Title
Improper Data Validation in liboauth2
Summary
In liboauth2 the Demonstrating Proof-of-Possession (DPoP) verifier accepts a proof whose JSON Web Key (jwk) header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2_token_verify() function returns success for a malformed DPoP proof that embeds the private Elliptic Curve (EC) key in the header.
This issue was fixed in version 2.3.0
Severity ?
CWE
- CWE-358 - Improperly Implemented Security Check for Standard
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Credits
Michał Majchrowicz (AFINE Team)
Marcin Wyczechowski (AFINE Team)
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CVE-2026-54430 (GCVE-0-2026-54430)
Vulnerability from cvelistv5 – Published: 2026-07-02 10:30 – Updated: 2026-07-02 12:17 X_Open Source
VLAI?
Title
Server-Site Request Forgery in liboauth2
Summary
liboauth2 is vulnerable to Server-Side Request Forgery in oauth2_jose_jwks_aws_alb_resolve() function. The AWS ALB verifier reads both signer and kid from the unverified JWT
header. If signer matches the configured ARN, kid is appended to
alb_base_url without URL encoding or path sanitization, and the HTTP GET
is issued before signature verification. This allows an attacker to force
the server to send a GET request to an attacker-chosen internal path.
This issue was fixed in version 2.3.0
Severity ?
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Credits
Michał Majchrowicz (AFINE Team)
Marcin Wyczechowski (AFINE Team)
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