{"id":"CVE-2026-55378","state":"PUBLISHED","title":"JS Recon: Command injection in PR Branch Checker workflow via untrusted pull request context values","description":"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.","publishedAt":"2026-08-28T18:15:41.125Z","updatedAt":"2026-09-01T01:51:26.785Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["shriyanss js-recon"],"affected":[{"vendor":"shriyanss","product":"js-recon","versions":[{"version":">= 1.2.1-beta.1, < 1.3.1-beta.2","status":"affected"}]}],"references":["https://github.com/js-recon/js-recon/security/advisories/GHSA-w9cj-mg3x-qjm4","https://github.com/js-recon/js-recon/pull/121","https://github.com/js-recon/js-recon/commit/447876c4bfa9ec5bc98cbc65d7a3e5f889412491","https://github.com/js-recon/js-recon/releases/tag/v1.3.1-beta.2"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55378.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55378","state":"PUBLISHED","datePublished":"2026-08-28T18:15:41.125Z","dateUpdated":"2026-09-01T01:51:26.785Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T18:57:40.181Z"},"containers":{"cna":{"title":"JS Recon: Command injection in PR Branch Checker workflow via untrusted pull request context values","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"shriyanss","product":"js-recon","versions":[{"version":">= 1.2.1-beta.1, < 1.3.1-beta.2","status":"affected"}]}],"references":[{"url":"https://github.com/js-recon/js-recon/security/advisories/GHSA-w9cj-mg3x-qjm4","name":"https://github.com/js-recon/js-recon/security/advisories/GHSA-w9cj-mg3x-qjm4","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/js-recon/js-recon/pull/121","name":"https://github.com/js-recon/js-recon/pull/121","tags":["x_refsource_MISC"]},{"url":"https://github.com/js-recon/js-recon/commit/447876c4bfa9ec5bc98cbc65d7a3e5f889412491","name":"https://github.com/js-recon/js-recon/commit/447876c4bfa9ec5bc98cbc65d7a3e5f889412491","tags":["x_refsource_MISC"]},{"url":"https://github.com/js-recon/js-recon/releases/tag/v1.3.1-beta.2","name":"https://github.com/js-recon/js-recon/releases/tag/v1.3.1-beta.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","lang":"en","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-28T18:15:41.125Z"},"source":{"advisory":"GHSA-w9cj-mg3x-qjm4","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-01T01:51:16.279187Z","id":"CVE-2026-55378","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-01T01:51:26.785Z"}}]}}}