{"id":"GHSA-xx64-wwv2-hcqq","aliases":["RUSTSEC-2026-0113"],"status":"published","title":"astral-tokio-tar: `unpack_in` can chmod arbitrary directories by following symlinks","description":"### Impact\n\nIn versions 0.6.0 and earlier of astral-tokio-tar, the `unpack_in` API could inadvertently modify the permissions of external (i.e. non-archive) directories outside of the archive. An attacker could use this to contrite a tar archive that maliciously changes directory permissions outside of its intended hierarchy. This flaw only affects directories; individual file permissions cannot be modified via it.\n\nSee GHSA-j4xf-2g29-59ph for the equivalent flaw in the `tar` crate.\n\n### Patches\n\nVersions 0.6.1 and newer of astral-tokio-tar use `fs::symlink_metdata` rather than `fs::metadata`, avoiding the traversal. \n\n### Workarounds\n\nUsers are advised to upgrade to version 0.6.1 or newer to address this advisory.\n\nUsers should experience no breaking changes as a result of the patch above.\n\n### Resources\n\n- GHSA-j4xf-2g29-59ph for the original `tar` vulnerability\n\n### Attribution\n\n- Reporter: Adam Harvey (@lawngnome)","severity":{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U","level":"low","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-61"],"published":"2026-04-27T12:00:00Z","modified":"2026-10-12T18:00:09Z","fixes":[{"ecosystem":"crates.io","package":"astral-tokio-tar","fixed_in":["0.6.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"astral-tokio-tar","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.6.0"},{"fixed":"0.6.1"}]}]},{"source":"osv","ecosystem":"crates.io","package":"astral-tokio-tar","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.6.1"}]}]},{"source":"osv","ecosystem":"crates.io","package":"astral-tokio-tar","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.6.1"}]}]}],"references":[{"url":"https://github.com/astral-sh/tokio-tar/security/advisories/GHSA-xx64-wwv2-hcqq","tags":["web"]},{"url":"https://github.com/advisories/GHSA-xx64-wwv2-hcqq","tags":["advisory"]},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0113.html","tags":["web","advisory"]},{"url":"https://github.com/astral-sh/tokio-tar","tags":["package"]},{"url":"https://crates.io/crates/astral-tokio-tar","tags":["package"]},{"url":"https://github.com/astral-sh/tokio-tar/commit/f1fa37043a6fe798dcd1fd4b3000d889ac35b183","tags":["web"]}],"sources":{"ghsa":[{"id":"GHSA-xx64-wwv2-hcqq","title":"astral-tokio-tar: `unpack_in` can chmod arbitrary directories by following symlinks","description":"### Impact\n\nIn versions 0.6.0 and earlier of astral-tokio-tar, the `unpack_in` API could inadvertently modify the permissions of external (i.e. non-archive) directories outside of the archive. An attacker could use this to contrite a tar archive that maliciously changes directory permissions outside of its intended hierarchy. This flaw only affects directories; individual file permissions cannot be modified via it.\n\nSee GHSA-j4xf-2g29-59ph for the equivalent flaw in the `tar` crate.\n\n### Patches\n\nVersions 0.6.1 and newer of astral-tokio-tar use `fs::symlink_metdata` rather than `fs::metadata`, avoiding the traversal. \n\n### Workarounds\n\nUsers are advised to upgrade to version 0.6.1 or newer to address this advisory.\n\nUsers should experience no breaking changes as a result of the patch above.\n\n### Resources\n\n- GHSA-j4xf-2g29-59ph for the original `tar` vulnerability\n\n### Attribution\n\n- Reporter: Adam Harvey (@lawngnome)","status":"published","published":"2026-05-06T17:26:38Z","modified":"2026-05-06T17:26:39Z","cvss":[{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U","level":"low"}],"cwes":["CWE-61"],"updated_at":"2026-11-02T14:40:01.917039Z"}],"osv":[{"id":"GHSA-xx64-wwv2-hcqq","title":"astral-tokio-tar: `unpack_in` can chmod arbitrary directories by following symlinks","description":"### Impact\n\nIn versions 0.6.0 and earlier of astral-tokio-tar, the `unpack_in` API could inadvertently modify the permissions of external (i.e. non-archive) directories outside of the archive. An attacker could use this to contrite a tar archive that maliciously changes directory permissions outside of its intended hierarchy. This flaw only affects directories; individual file permissions cannot be modified via it.\n\nSee GHSA-j4xf-2g29-59ph for the equivalent flaw in the `tar` crate.\n\n### Patches\n\nVersions 0.6.1 and newer of astral-tokio-tar use `fs::symlink_metdata` rather than `fs::metadata`, avoiding the traversal. \n\n### Workarounds\n\nUsers are advised to upgrade to version 0.6.1 or newer to address this advisory.\n\nUsers should experience no breaking changes as a result of the patch above.\n\n### Resources\n\n- GHSA-j4xf-2g29-59ph for the original `tar` vulnerability\n\n### Attribution\n\n- Reporter: Adam Harvey (@lawngnome)","status":"published","published":"2026-05-06T17:26:38Z","modified":"2026-09-10T03:51:07.301797464Z","cvss":[{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U","level":"low"}],"cwes":["CWE-61"],"updated_at":"2026-11-02T15:47:00.604718Z"},{"id":"RUSTSEC-2026-0113","title":"`unpack_in` can chmod arbitrary directories by following symlinks","description":"In versions 0.6.0 and earlier of astral-tokio-tar, the unpack_in API could\ninadvertently modify the permissions of external (i.e. non-archive) directories\noutside of the archive. An attacker could use this to contrite a tar archive\nthat maliciously changes directory permissions outside of its intended\nhierarchy. This flaw only affects directories; individual file permissions\ncannot be modified via it.\n\nSee GHSA-j4xf-2g29-59ph for the equivalent flaw in the tar crate.","status":"published","published":"2026-04-27T12:00:00Z","modified":"2026-10-12T18:00:09.237324844Z","updated_at":"2026-11-02T15:53:40.430679Z"}]}}