{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.2.1-beta.1"
              },
              {
                "fixed": "1.3.1-beta.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "9d239baf051f35833503276ef5a5b2d33196a542"
            },
            {
              "fixed": "447876c4bfa9ec5bc98cbc65d7a3e5f889412491"
            },
            {
              "fixed": "7470c2119339650bb798acf1247b594e17d4a214"
            }
          ],
          "repo": "https://github.com/js-recon/js-recon",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-w9cj-mg3x-qjm4"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55378.json"
  },
  "details": "JS Recon is a JavaScript enumeration and SAST tool. From 1.2.1-beta.1 until 1.3.1-beta.2, the PR Branch Checker workflow in .github/workflows/pr_checker.yml places github.head_ref and github.event.pull_request.head.repo.full_name into BRANCH_NAME and SOURCE_REPO and interpolates those untrusted values into a shell gh pr comment command. A remote user who opens a pull request can use shell metacharacters in a branch or fork name to execute commands in the GitHub Actions runner with the workflow's GITHUB_TOKEN, which has pull-requests write permission. This issue is fixed in version 1.3.1-beta.2.",
  "id": "CVE-2026-55378",
  "modified": "2026-08-30T03:31:06.225822628Z",
  "published": "2026-08-28T18:15:41.125Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/js-recon/js-recon/releases/tag/v1.3.1-beta.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55378.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/js-recon/js-recon/security/advisories/GHSA-w9cj-mg3x-qjm4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55378"
    },
    {
      "type": "FIX",
      "url": "https://github.com/js-recon/js-recon/commit/447876c4bfa9ec5bc98cbc65d7a3e5f889412491"
    },
    {
      "type": "FIX",
      "url": "https://github.com/js-recon/js-recon/pull/121"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "JS Recon: Command injection in PR Branch Checker workflow via untrusted pull request context values"
}