CVE-2026-18353: high-severity vulnerability in Eclipse CSI - PIA
Unauthenticated SSRF in PIA via OIDC issuer allowlist bypass
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.3%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
Eclipse Foundation · Eclipse CSI - PIARelated CVEs — Eclipse CSI - PIA
In the same product, most dangerous first.
CVE-2026-12616MEDIUMCVE-2026-12616EPSS 0.5%CVE-2026-108062MEDIUMPre-authentication OIDC discovery and JWKS fetches run synchronously on the asyncio event loopEPSS 0.5%CVE-2026-107597MEDIUMjwks_uri from the OIDC discovery document is fetched without checking its origin or schemeEPSS 0.4%CVE-2026-14336HIGHCVE-2026-14336EPSS 0.3%