Bug 2496465 (CVE-2026-54430) - CVE-2026-54430 liboauth2: liboauth2: Server-Side Request Forgery allows unauthorized internal network access
Summary: CVE-2026-54430 liboauth2: liboauth2: Server-Side Request Forgery allows unaut...
Keywords:
Status: NEW
Alias: CVE-2026-54430
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2496724
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-02 11:01 UTC by OSIDB Bzimport
Modified: 2026-07-03 02:04 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-07-02 11:01:34 UTC 
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
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