CVE-2026-54430
Server-Site Request Forgery in liboauth2
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
INFO
Published Date :
July 2, 2026, 10:30 a.m.
Last Modified :
July 2, 2026, 10:30 a.m.
Remotely Exploit :
No
Source :
CERT-PL
Affected Products
The following products are affected by CVE-2026-54430
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 |
Solution
- Update liboauth2 to version 2.3.0 or later.
- Validate JWT header before making HTTP requests.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-54430 vulnerability anywhere in the article.
-
cert.pl
Vulnerabilities in OpenIDC liboauth2 software
Vulnerabilities in OpenIDC liboauth2 software CVE ID CVE-2026-54430 Publication date 02 July 2026 Vendor OpenIDC Product liboauth2 Vulnerable versions All before 2.3.0 Vulnerability type (CWE) Server- ... Read more