CVE-2026-18353
Severity CVSS v4.0:
HIGH
Type:
CWE-918
Server-Side Request Forgery (SSRF)
Publication date:
30/07/2026
Last modified:
30/07/2026
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.
Impact
Base Score 4.0
8.80
Severity 4.0
HIGH