{"affected":[{"defaultStatus":"unknown","product":"Enterprise Server","source":"CNA: GitHub_P","vendor":"GitHub","versions":[{"lessThan":"3.17.*","status":"affected","version":"3.17.0","versionType":"semver"},{"lessThan":"3.18.*","status":"affected","version":"3.18.0","versionType":"semver"},{"changes":[{"at":"3.19.14","status":"unaffected"}],"lessThan":"3.19.*","status":"affected","version":"3.19.0","versionType":"semver"},{"changes":[{"at":"3.20.10","status":"unaffected"}],"lessThan":"3.20.*","status":"affected","version":"3.20.0","versionType":"semver"},{"changes":[{"at":"3.21.8","status":"unaffected"}],"lessThan":"3.21.*","status":"affected","version":"3.21.0","versionType":"semver"},{"changes":[{"at":"3.22.3","status":"unaffected"}],"lessThan":"3.22.*","status":"affected","version":"3.22.0","versionType":"semver"}]}],"cveId":"CVE-2026-15343","cwes":["CWE-22"],"description":"A path traversal vulnerability was identified in GitHub Enterprise Server that allowed an attacker with code execution inside a Dependabot updater container to write files to arbitrary repository paths, including GitHub Actions workflow files under .github/workflows/, because path validation did not check the actual write destination. The initial fix in versions 3.21.3, 3.20.5, 3.19.9, 3.18.12, and 3.17.18 was incomplete because validation checked the supplied symlink target, while the publisher wrote the file using its directory and name. Writing GitHub Actions workflow files required the Dependabot installation to have workflows: write permission. Depending on repository permissions and workflow configuration, including a relevant pull_request_target workflow or auto-merge, an injected workflow could execute with access to GitHub Actions secrets. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.23 and was fully fixed in versions 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program.","epss":{"date":"2026-11-03","percentile":0.55065,"score":0.00752},"exploits":[],"kev":null,"metrics":[{"score":8.6,"severity":"high","source":"CNA: GitHub_P","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":8.6,"severity":"high","source":"NVD: product-cna@github.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"}],"modifiedAt":1793747858267,"publishedAt":1784301526037,"references":[{"source":"CNA: GitHub_P","tags":["release-notes","x_incomplete-fix"],"url":"https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.18"},{"source":"CNA: GitHub_P","tags":["release-notes","x_incomplete-fix"],"url":"https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.12"},{"source":"CNA: GitHub_P","tags":["release-notes","x_incomplete-fix"],"url":"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.9"},{"source":"CNA: GitHub_P","tags":["release-notes","x_incomplete-fix"],"url":"https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.5"},{"source":"CNA: GitHub_P","tags":["release-notes","x_incomplete-fix"],"url":"https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.3"},{"source":"CNA: GitHub_P","tags":["release-notes","patch"],"url":"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.14"},{"source":"CNA: GitHub_P","tags":["release-notes","patch"],"url":"https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.10"},{"source":"CNA: GitHub_P","tags":["release-notes","patch"],"url":"https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.8"},{"source":"CNA: GitHub_P","tags":["release-notes","patch"],"url":"https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.3"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.18"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.12"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.14"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.9"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.10"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.5"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.3"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.8"},{"source":"product-cna@github.com","tags":[],"url":"https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.3"}],"remediation":[{"kind":"fix","source":"CNA: GitHub_P","text":"Upgrade to GitHub Enterprise Server 3.19.14, 3.20.10, 3.21.8, or 3.22.3, or a later patch release of the applicable release line. The previously announced fixes in 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3 were incomplete and do not fully remediate this vulnerability. No complete fix is available for the 3.17 or 3.18 release lines; users of those lines must upgrade to a release containing the complete fix."},{"kind":"fix","source":"CNA: GitHub_P","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.14"},{"kind":"fix","source":"CNA: GitHub_P","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.10"},{"kind":"fix","source":"CNA: GitHub_P","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.8"},{"kind":"fix","source":"CNA: GitHub_P","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.3"}],"revision":"19975c865a19d1f9e80dfd6a6370fcd550d241de173679978f80a252c89e33fb","sources":[{"modifiedAt":1793746104812,"name":"CNA: GitHub_P","retrievedAt":1793748244497,"url":"https://www.cve.org/CVERecord?id=CVE-2026-15343"},{"modifiedAt":1793747858267,"name":"NVD","retrievedAt":1793751395580,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15343"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793748252180,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-15343"}],"ssvc":{"assessedAt":1784305895938,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Path traversal vulnerability in GitHub Enterprise Server allowed writing files to arbitrary repository paths, including GitHub Actions workflow files, via unchecked Dependabot dependency-file paths","updatedAt":1793751395580}