liboauth2: liboauth2 is vulnerable to Server-Side Request Forgery in oauth2_jose_jwks_aws_alb_resolve() function. The AWS ALB ve...
CVE-2026-54430 is fixed in liboauth2 on 1 platform by DEBIAN-CVE-2026-54430 (version 2.3.0-1), released July 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| liboauth2 · Debian 14 | 2.3.0-1 | DEBIAN-CVE-2026-54430 | Jul 3, 2026 |
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