{"id":"CVE-2025-61785","aliases":["GHSA-vg2r-rmgp-cgqj"],"url":"https://o3.security/vulnerability/CVE-2025-61785","summary":"Deno's --deny-write check does not prevent permission bypass","details":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. In versions prior to 2.5.3 and 2.2.15, `Deno.FsFile.prototype.utime` and `Deno.FsFile.prototype.utimeSync` are not limited by the permission model check `--deny-write=./`. It's possible to change to change the access (`atime`) and modification (`mtime`) times on the file stream resource even when the file is opened with `read` only permission (and `write`: `false`) and file write operations are not allowed (the script is executed with `--deny-write=./`). Similar APIs like `Deno.utime` and `Deno.utimeSync` require `allow-write` permission, however, when a file is opened, even with read only flags and deny-write permission, it's still possible to change the access (`atime`) and modification (`mtime`) times, and thus bypass the permission model. Versions 2.5.3 and 2.2.15 fix the issue.","published":"2025-10-08T00:37:01.869Z","modified":"2026-08-08T03:32:21.564382278Z","cvss":{"score":3.3,"severity":"LOW","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"deno","fixedVersion":"2.5.3"}],"fix":{"url":"https://github.com/denoland/deno/commit/992e998dfe436cdc9325232759af8be92f11739b","label":"denoland/deno@992e998"},"references":[{"type":"WEB","url":"https://github.com/denoland/deno/releases/tag/v2.2.15"},{"type":"WEB","url":"https://github.com/denoland/deno/releases/tag/v2.5.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/61xxx/CVE-2025-61785.json"},{"type":"ADVISORY","url":"https://github.com/denoland/deno/security/advisories/GHSA-vg2r-rmgp-cgqj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-61785"},{"type":"FIX","url":"https://github.com/denoland/deno/commit/992e998dfe436cdc9325232759af8be92f11739b"},{"type":"FIX","url":"https://github.com/denoland/deno/pull/30872"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:32:21.564382278Z"}}