CVE-2026-14336 Server-side request forgery in Eclipse CSI - PIA
An attacker can bypass OIDC issuer validation via prefix matching to force server-side requests and forge authentication tokens.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-14336?
CVE-2026-14336 is a high-severity server-side request forgery vulnerability in Eclipse CSI - PIA, published on 2 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PIA's OIDC issuer allowlist for Jenkins tokens uses a bare string-prefix check (issuer.startswith(' https://ci.eclipse.org ') in is_issuer_known, pia/models.py:139) instead of validating the issuer as a properly host-bounded URL. An attacker can craft an issuer such as https://[email protected] (userinfo trick) or https://ci.eclipse.org.evil.host (suffix trick) that satisfies the prefix check while pointing the OIDC discovery and JWKS fetches at a server the attacker controls. An unauthenticated caller of POST /v1/upload/sbom can use this to force PIA to make outbound HTTP(S) requests to an arbitrary attacker-chosen host, and to have oidc.verify_token accept a JWT signed with the attacker's own key.
Weakness: CWE-918
Which versions are affected by CVE-2026-14336?
How do I fix CVE-2026-14336?
No fix has been published for CVE-2026-14336 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-14336 being exploited?
There is no known exploitation of CVE-2026-14336 in the wild and no public exploit code.