Vulnerability Description
PIA's `POST /v1/upload/sbom` endpoint accepts a Bearer JWT and checks its **unverified** `iss` claim against an issuer allowlist using Python's `urlparse` before performing OIDC discovery with `requests`. Because `urlparse` and `requests`/`urllib3` parse an authority string containing a backslash (e.g. `https://attacker-host\@ci.eclipse.org/`) into *different* hostnames, an attacker can craft an issuer that passes the allowlist check yet drives `requests` — and subsequently `urllib.request.urlopen` for JWKS retrieval — to connect to an arbitrary attacker-chosen host, port, and scheme.
Related Weaknesses (CWE)
References
- https://github.com/eclipse-csi/pia/security/advisories/GHSA-v249-9xjm-qhgf
- https://github.com/eclipse-csi/pia/security/advisories/GHSA-v249-9xjm-qhgf
FAQ
What is CVE-2026-18353?
CVE-2026-18353 is a documented vulnerability. PIA's `POST /v1/upload/sbom` endpoint accepts a Bearer JWT and checks its **unverified** `iss` claim against an issuer allowlist using Python's `urlparse` before performing OIDC discovery with `reques...
How severe is CVE-2026-18353?
CVSS scoring is not yet available for CVE-2026-18353. Check NVD for updates.
Is there a patch for CVE-2026-18353?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.