{"id":"CVE-2026-22864","summary":"Deno has an incomplete fix for command-injection prevention on Windows — case-insensitive extension bypass","details":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Before 2.5.6, a prior patch aimed to block spawning Windows batch/shell files by returning an error when a spawned path’s extension matched .bat or .cmd. That check performs a case-sensitive comparison against lowercase literals and therefore can be bypassed when the extension uses alternate casing (for example .BAT, .Bat, etc.). This vulnerability is fixed in 2.5.6.","aliases":["GHSA-m3c4-prhw-mrx6"],"modified":"2026-04-10T05:38:52.868512Z","published":"2026-01-15T22:58:52.463Z","database_specific":{"cwe_ids":["CWE-77"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22864.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/denoland/deno/releases/tag/v2.5.6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22864.json"},{"type":"ADVISORY","url":"https://github.com/denoland/deno/security/advisories/GHSA-m3c4-prhw-mrx6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22864"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/denoland/deno","events":[{"introduced":"0"},{"fixed":"1b5f3112af364a3327b26f720746819c4f20f20d"}]}],"versions":["std/0.34.0","std/0.35.0","std/0.36.0","std/0.37.0","std/0.38.0","std/0.39.0","std/0.40.0","std/0.41.0","std/0.42.0","std/0.50.0","std/0.51.0","std/0.52.0","std/0.53.0","std/0.54.0","std/0.55.0","std/0.56.0","std/0.57.0","std/0.58.0","std/0.59.0","std/0.60.0","std/0.61.0","std/0.62.0","std/0.63.0","std/0.64.0","std/0.65.0","std/0.66.0","std/0.67.0","std/0.68.0","std/0.69.0","std/0.70.0","std/0.71.0","std/0.72.0","std/0.73.0","std/0.74.0","std/0.75.0","std/0.76.0","std/0.77.0","std/0.78.0","std/0.79.0","std/0.80.0","std/0.81.0","std/0.82.0","std/0.83.0","std/0.84.0","std/0.85.0","v0.0.1","v0.0.3","v0.1.0","v0.1.1","v0.1.10","v0.1.11","v0.1.12","v0.1.2","v0.1.3","v0.1.4","v0.1.5","v0.1.6","v0.1.7","v0.1.8","v0.1.9","v0.10.0","v0.11.0","v0.12.0","v0.13.0","v0.14.0","v0.15.0","v0.16.0","v0.17.0","v0.18.0","v0.19.0","v0.2.0","v0.2.1","v0.2.10","v0.2.11","v0.2.2","v0.2.3","v0.2.4","v0.2.5","v0.2.6","v0.2.7","v0.2.8","v0.2.9","v0.20.0","v0.21.0","v0.22.0","v0.23.0","v0.24.0","v0.25.0","v0.26.0","v0.27.0","v0.28.0","v0.28.1","v0.29.0","v0.3.0","v0.3.1","v0.3.10","v0.3.11","v0.3.2","v0.3.3","v0.3.4","v0.3.5","v0.3.6","v0.3.7","v0.3.8","v0.3.9","v0.30.0","v0.30.1","v0.31.0","v0.32.0","v0.33.0","v0.34.0","v0.35.0","v0.36.0","v0.37.0","v0.37.1","v0.38.0","v0.39.0","v0.4.0","v0.40.0","v0.41.0","v0.42.0","v0.5.0","v0.6.0","v0.7.0","v0.8.0","v0.9.0","v1.0.0","v1.0.0-rc1","v1.0.0-rc2","v1.0.0-rc3","v1.0.1","v1.0.2","v1.0.3","v1.0.4","v1.0.5","v1.1.0","v1.1.1","v1.1.2","v1.1.3","v1.10.0","v1.10.1","v1.11.0","v1.11.1","v1.11.2","v1.12.0","v1.12.1","v1.12.2","v1.13.0","v1.13.1","v1.13.2","v1.14.0","v1.14.1","v1.14.2","v1.15.0","v1.15.1","v1.15.2","v1.15.3","v1.16.0","v1.16.1","v1.16.2","v1.17.0","v1.18.0","v1.19.0","v1.2.0","v1.2.1","v1.2.2","v1.2.3","v1.20.0","v1.20.1","v1.21.0","v1.22.0","v1.23.0","v1.24.0","v1.25.0","v1.26.0","v1.27.0","v1.28.0","v1.29.0","v1.3.0","v1.3.1","v1.3.2","v1.3.3","v1.30.0","v1.31.0","v1.32.0","v1.33.0","v1.34.0","v1.35.0","v1.36.0","v1.37.0","v1.38.0","v1.39.0","v1.4.0","v1.4.1","v1.4.2","v1.4.3","v1.4.4","v1.4.5","v1.4.6","v1.40.0","v1.41.0","v1.42.0","v1.43.0","v1.43.1","v1.44.0","v1.45.0","v1.46.0","v1.5.0","v1.5.1","v1.5.2","v1.5.3","v1.5.4","v1.6.0","v1.6.1","v1.6.2","v1.6.3","v1.7.0","v1.7.1","v1.7.2","v1.7.3","v1.7.4","v1.8.0","v1.8.1","v1.8.2","v1.9.0","v1.9.1","v1.9.2","v2.0.0","v2.1.0","v2.2.0","v2.3.0","v2.3.1","v2.3.2","v2.3.3","v2.3.4","v2.3.5","v2.3.6","v2.3.7","v2.4.0","v2.4.1","v2.4.2","v2.4.3","v2.4.4","v2.4.5","v2.5.0","v2.5.1","v2.5.2","v2.5.3","v2.5.4","v2.5.5"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22864.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}