{"id":"CVE-2026-55378","summary":"JS Recon: Command injection in PR Branch Checker workflow via untrusted pull request context values","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.","aliases":["GHSA-w9cj-mg3x-qjm4"],"modified":"2026-09-02T03:30:44.581563852Z","published":"2026-08-28T18:15:41.125Z","database_specific":{"cwe_ids":["CWE-78"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55378.json","cna_assigner":"GitHub_M"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/js-recon/js-recon","events":[{"introduced":"9d239baf051f35833503276ef5a5b2d33196a542"},{"fixed":"447876c4bfa9ec5bc98cbc65d7a3e5f889412491"},{"fixed":"7470c2119339650bb798acf1247b594e17d4a214"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"1.2.1-beta.1"},{"fixed":"1.3.1-beta.2"}]}}],"versions":["v1.3.1-beta.1","v1.3.1-alpha.4","v1.3.1-alpha.3","v1.3.1-alpha.2","v1.3.1-alpha.1","v1.2.2","v1.2.2-alpha.11","v1.2.2-alpha.10","v1.2.2-alpha.9","v1.2.2-alpha.8","v1.2.2-alpha.7","v1.2.2-alpha.6","v1.2.2-alpha.5","v1.2.2-alpha.3","v1.2.2-alpha.2","v1.2.2-alpha.1","v1.2.1","v1.2.1-beta.2","v1.2.1-beta.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55378.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}