Skip to content
Sign in
5.1 Medium

CVE-2026-54430 liboauth2 is vulnerable to Server-Side Request Forgery in oauth2_jose_jwks_aws_alb_resolve() function. The AWS ALB…

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

Affected products and versions

Product Affected versions Fixed in
liboauth2 2.3 earliest → < 2.3.0 2.3.0

Other CVEs of liboauth2

The 2 CVEs of liboauth2 →
CVE-2026-54431 In liboauth2 the Demonstrating Proof-of-Possession (DPoP) verifier accepts a proof whose JSON Web Key (jwk) header… 5.1 Medium
Track this CVE