{"id":"DEBIAN-CVE-2026-47078","details":"Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.  zip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.  This vulnerability is associated with program file lib/stdlib/src/zip.erl.  This issue affects OTP from OTP 27.1 before OTP 27.3.4.15, OTP 28.5.0.4, and OTP 29.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3.","modified":"2026-09-25T08:47:30.574073975Z","published":"2026-07-27T16:17:07.643Z","upstream":["CVE-2026-47078"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-47078"}],"affected":[{"package":{"name":"erlang","ecosystem":"Debian:12","purl":"pkg:deb/debian/erlang?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:25.2.3+dfsg-1","1:25.2.3+dfsg-1+deb12u1","1:25.2.3+dfsg-1+deb12u2","1:25.2.3+dfsg-1+deb12u3","1:25.2.3+dfsg-1+deb12u4","1:25.3.2.10+dfsg-1","1:25.3.2.10+dfsg-2","1:25.3.2.11+dfsg-1","1:25.3.2.12+dfsg-1","1:25.3.2.12+dfsg-2","1:25.3.2.12+dfsg-3","1:25.3.2.8+dfsg-1","1:26.0+dfsg-1","1:26.0.1+dfsg-1","1:26.0.2+dfsg-1","1:26.0~rc2+dfsg-1","1:26.0~rc3+dfsg-1","1:26.1.2+dfsg-1","1:26.2.1+dfsg-1","1:26.2.4+dfsg-1","1:27.0+dfsg-1","1:27.0.1+dfsg-1","1:27.0.1+dfsg-2","1:27.0.1+dfsg-3","1:27.0~rc3+dfsg-1","1:27.0~rc3+dfsg-2","1:27.0~rc3+dfsg-3","1:27.0~rc3+dfsg-4","1:27.1.2+dfsg-1","1:27.2+dfsg-1","1:27.2+dfsg-2","1:27.2+dfsg-3~exp1","1:27.2.1+dfsg-1","1:27.2.1+dfsg-2","1:27.2.2+dfsg-1","1:27.2.3+dfsg-1","1:27.2.4+dfsg-1","1:27.3+dfsg-1","1:27.3.1+dfsg-1","1:27.3.2+dfsg-1","1:27.3.3+dfsg-1","1:27.3.4+dfsg-1","1:27.3.4.1+dfsg-1","1:27.3.4.10+dfsg-1","1:27.3.4.11+dfsg-1","1:27.3.4.11+dfsg-2","1:27.3.4.11+dfsg-3","1:27.3.4.11+dfsg-4","1:27.3.4.11+dfsg-5","1:27.3.4.11+dfsg-6","1:27.3.4.11+dfsg-7","1:27.3.4.12+dfsg-1","1:27.3.4.3+dfsg-1","1:27.3.4.4+dfsg-1","1:27.3.4.6+dfsg-1","1:27.3.4.8+dfsg-1","1:27.3.4.9+dfsg-1","1:28.0+dfsg-1","1:28.0.1+dfsg-1","1:28.0.2+dfsg-1","1:28.0.4+dfsg-1","1:28.1.1+dfsg-1","1:28.2+dfsg-1","1:28.3+dfsg-1","1:28.3.1+dfsg-1","1:29.0+dfsg-1","1:29.0+dfsg-2","1:29.0.1+dfsg-1","1:29.0.2+dfsg-1","1:29.0.3+dfsg-1","1:29.0.4+dfsg-1","1:29.0.6+dfsg-1","1:29.0~rc1+dfsg-1","1:29.0~rc1+dfsg-2","1:29.0~rc2+dfsg-1","1:29.0~rc3+dfsg-1","1:29.0~rc3+dfsg-2","1:29.0~rc3+dfsg-3","1:29.0~rc3+dfsg-4","1:29.1.1+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47078.json"}},{"package":{"name":"erlang","ecosystem":"Debian:13","purl":"pkg:deb/debian/erlang?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:27.3.4.1+dfsg-1+deb13u3"}]}],"versions":["1:27.3.4.1+dfsg-1","1:27.3.4.1+dfsg-1+deb13u1","1:27.3.4.1+dfsg-1+deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47078.json"}},{"package":{"name":"erlang","ecosystem":"Debian:14","purl":"pkg:deb/debian/erlang?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:29.0.4+dfsg-1"}]}],"versions":["1:27.3.4.1+dfsg-1","1:27.3.4.10+dfsg-1","1:27.3.4.11+dfsg-1","1:27.3.4.11+dfsg-2","1:27.3.4.11+dfsg-3","1:27.3.4.11+dfsg-4","1:27.3.4.11+dfsg-5","1:27.3.4.11+dfsg-6","1:27.3.4.11+dfsg-7","1:27.3.4.12+dfsg-1","1:27.3.4.3+dfsg-1","1:27.3.4.4+dfsg-1","1:27.3.4.6+dfsg-1","1:27.3.4.8+dfsg-1","1:27.3.4.9+dfsg-1","1:28.0+dfsg-1","1:28.0.1+dfsg-1","1:28.0.2+dfsg-1","1:28.0.4+dfsg-1","1:28.1.1+dfsg-1","1:28.2+dfsg-1","1:28.3+dfsg-1","1:28.3.1+dfsg-1","1:29.0+dfsg-1","1:29.0+dfsg-2","1:29.0.1+dfsg-1","1:29.0.2+dfsg-1","1:29.0.3+dfsg-1","1:29.0~rc1+dfsg-1","1:29.0~rc1+dfsg-2","1:29.0~rc2+dfsg-1","1:29.0~rc3+dfsg-1","1:29.0~rc3+dfsg-2","1:29.0~rc3+dfsg-3","1:29.0~rc3+dfsg-4"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47078.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/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"}]}