CVE-2026-18353

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

No CVSS.

References

Link	Resource
https://github.com/eclipse-csi/pia/security/advisories/GHSA-v249-9xjm-qhgf
https://github.com/eclipse-csi/pia/security/advisories/GHSA-v249-9xjm-qhgf

Configurations

No configuration.

History

23 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) El endpoint “POST /v1/upload/sbom” de PIA acepta un JWT de tipo Bearer y verifica su campo “iss” no verificado contra una lista blanca de emisores utilizando “urlparse” de Python antes de realizar el descubrimiento OIDC con “requests”. Debido a que “urlparse” y “requests”/“urllib3” analizan una cadena de autoridad que contiene una barra invertida (por ejemplo, “https://attacker-host\@ci.eclipse.org/”) en nombres de host diferentes, un atacante puede crear un emisor que pasa la verificación de la lista blanca pero dirige a “requests” - y posteriormente a “urllib.request.urlopen” para la recuperación de JWKS - a conectarse a un host, puerto y esquema arbitrarios elegidos por el atacante.

Information

Published : 2026-07-30 08:16

Updated : 2026-10-23 22:10

NVD link : CVE-2026-18353

Mitre link : CVE-2026-18353

CVE.ORG link : CVE-2026-18353

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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