{"id":"DEBIAN-CVE-2026-73030","details":"unearth through 0.18.2, fixed in commit 6c78164, contains a path traversal vulnerability in the is_within_directory function that fails to normalize paths before validation, allowing ../ sequences to bypass directory containment checks. Attackers can supply malicious tar archives with symlink members or traversal sequences to write files to arbitrary filesystem locations accessible to the process.","modified":"2026-08-27T23:06:21.910363838Z","published":"2026-08-10T21:17:26.450Z","upstream":["CVE-2026-73030"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-73030"}],"affected":[{"package":{"name":"unearth","ecosystem":"Debian:12","purl":"pkg:deb/debian/unearth?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.0+ds1-1","0.11.0+ds-1","0.12.1+ds-1","0.14.0+ds-1","0.15.0+ds-1","0.15.1+ds-1","0.15.2+ds-1","0.15.3+ds-1","0.15.4+ds-1","0.15.5+ds-1","0.16.0+ds-1","0.16.1-1","0.17.1-1","0.17.2-1","0.17.3-1","0.17.5-1","0.18.1-1","0.18.2-1","0.18.3-1","0.7.2+ds-2","0.8.1+ds-1~exp1","0.9.1+ds-1","0.9.2+ds1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73030.json"}},{"package":{"name":"unearth","ecosystem":"Debian:13","purl":"pkg:deb/debian/unearth?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.17.5-1","0.18.1-1","0.18.2-1","0.18.3-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73030.json"}},{"package":{"name":"unearth","ecosystem":"Debian:14","purl":"pkg:deb/debian/unearth?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.18.3-1"}]}],"versions":["0.17.5-1","0.18.1-1","0.18.2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73030.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/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"}]}