CVE-2026-54430

Server-Site Request Forgery in liboauth2

Published: Jul 2, 2026Updated: Jul 2, 2026 Sources: CVE List NVDCWE-918

N/ACVSS

NVD MITRE

Description

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

No summary for this CVE yet.

Weaknesses

CWE-918

Affected Products

OpenIDC

oss-projectaka cjose, mod_auth_openidc, mod auth openidc

liboauth2Library

OSS Libraries / generic-library

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Command and Control

Initial Access

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References

https://cert.pl/en/posts/2026/07/CVE-2026-54430

cert.pl

https://github.com/OpenIDC/liboauth2

github.com

https://github.com/OpenIDC/liboauth2/commit/347507ac5b51f48c2933bbe49b2ee07c2af4712b

github.com

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