CVE-2026-18353 – Unauthenticated SSRF in PIA via OIDC issuer allowlist bypass

CVE ID :CVE-2026-18353

Published : July 30, 2026, 8:16 a.m. | 1 hour, 28 minutes ago

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.

Severity: 8.8 | HIGH

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