{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.4.0"
              },
              {
                "fixed": "0.6.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "5c70fac6f60dbbead382480528122c561536f1ef"
            },
            {
              "fixed": "b2180f4bc21ca5120dfa3cecec06e113ca847ff8"
            }
          ],
          "repo": "https://github.com/eclipse-csi/pia",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-v249-9xjm-qhgf"
  ],
  "database_specific": {
    "cna_assigner": "eclipse",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18353.json"
  },
  "details": "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.",
  "id": "CVE-2026-18353",
  "modified": "2026-08-12T03:51:28.702049854Z",
  "published": "2026-07-30T07:23:04.083Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18353.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/eclipse-csi/pia/security/advisories/GHSA-v249-9xjm-qhgf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18353"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/eclipse-csi/pia"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Unauthenticated SSRF in PIA via OIDC issuer allowlist bypass"
}