CVE-2026-18353 (GCVE-0-2026-18353)
Vulnerability from cvelistv5 – Published: 2026-07-30 07:23 – Updated: 2026-07-30 13:02
VLAI
EPSS
VEX
Title
Unauthenticated SSRF in PIA via OIDC issuer allowlist bypass
Summary
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
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-30 13:02 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Eclipse Foundation | Eclipse CSI - PIA |
Affected:
0.4.0 , < 0.6.0
(semver)
|
guessed |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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