{"id":"CVE-2021-29468","aliases":["ALPINE-CVE-2021-29468","BELL-CVE-2021-29468","EUVD-2021-16079","GHSA-rmp3-wq55-f557","OESA-2021-1210"],"status":"published","title":"Arbitrary code execution when checking out an attacker-controlled Git branch","description":"Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0124,"percentile":0.694,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2021-04-29T20:35:20Z","modified":"2026-10-20T10:50:08Z","fixes":[{"ecosystem":"openEuler:20.03-LTS-SP1","package":"git","fixed_in":["2.27.0-4.oe1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"git","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.27.0-4.oe1"}]}]}],"products":[{"vendor":"cygwin","product":"git"},{"vendor":"me-and","product":"cygwin-git"}],"references":[{"url":"https://github.com/me-and/Cygwin-Git/security/advisories/GHSA-rmp3-wq55-f557","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/me-and/Cygwin-Git/blob/main/check-backslash-safety.patch","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://cygwin.com/pipermail/cygwin-announce/2021-April/010018.html","tags":["x_refsource_MISC","x_transferred","Mailing List","Patch","Vendor Advisory","fix"]},{"url":"https://lore.kernel.org/git/CA+kUOa=juEdBMVr_gyTKjz7PkPt2DZHkXQyzcQmAWCsEHC_ssw%40mail.gmail.com/T/#u","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-29468","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2021-29468","tags":["advisory"]},{"url":"https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1210","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29468","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-29468","title":"Arbitrary code execution when checking out an attacker-controlled Git branch","description":"Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.","status":"published","published":"2021-04-29T20:35:20Z","modified":"2024-08-03T22:11:05.331Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-16079","description":"Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.","status":"published","published":"2021-04-29T20:35:20Z","modified":"2024-08-03T22:11:05Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T03:24:44.540278Z"}],"nvd":[{"id":"CVE-2021-29468","description":"Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.","status":"published","published":"2021-04-29T21:15:08.55Z","modified":"2026-06-17T03:47:42.147Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:06:52.81233Z"}],"osv":[{"id":"ALPINE-CVE-2021-29468","description":"Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.","status":"withdrawn","published":"2021-04-29T21:15:08.55Z","modified":"2026-07-14T08:03:28.434470405Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:48.646074Z"},{"id":"BELL-CVE-2021-29468","title":"CVE-2021-29468 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:13:56.309028Z","modified":"2026-01-26T09:49:24.273491Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:15.925958Z"},{"id":"CVE-2021-29468","description":"Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.","status":"published","published":"2021-04-29T21:15:08.55Z","modified":"2026-10-20T10:50:08.660496822Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.129331Z"},{"id":"OESA-2021-1210","title":"git security update","description":"Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.\nGit is easy to learn and has a tiny footprint with lightning fast performance. It outclasses SCM tools like Subversion, CVS, Perforce, and ClearCase with features like cheap local branching, convenient staging areas, and multiple workflows.\r\n\r\nSecurity Fix(es):\r\n\r\nCygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.(CVE-2021-29468)","status":"published","published":"2021-06-07T11:04:27Z","modified":"2026-08-18T01:15:44.387862674Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:38.987987Z"}]}}