{"id":"DEBIAN-CVE-2026-118673","details":"KeePassXC is a cross-platform community-driven port of the Windows application KeePass Password Safe. From 2.3.0 until 2.8.0, KeePassXC browser integration encrypts authorized responses in src/browser/BrowserMessageBuilder.cpp using a fixed 1 MiB output vector even though Botan::Sodium::crypto_box_easy() writes the plaintext length plus crypto_box_MACBYTES. A browser-protocol client that can access the per-user IPC endpoint, has a valid database association, and causes an unlocked database to generate and encrypt a sufficiently large authorized response can trigger a sequential out-of-bounds write before any response is delivered. This issue is fixed in version 2.8.0.","modified":"2026-11-04T09:47:34.164912074Z","published":"2026-10-29T16:18:03.873Z","upstream":["CVE-2026-118673"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-118673"}],"affected":[{"package":{"name":"keepassxc","ecosystem":"Debian:12","purl":"pkg:deb/debian/keepassxc?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.10+dfsg1-1","2.7.10+dfsg1-2","2.7.10+dfsg1-2.1","2.7.4+dfsg.1-2","2.7.6+dfsg.1-1","2.7.7+dfsg.1-1","2.7.7+dfsg.1-1+exp1","2.7.7+dfsg.1-2","2.7.7+dfsg.1-3","2.7.7+dfsg.1-3~exp1","2.7.9+dfsg1-1","2.8.0+dfsg1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-118673.json"}},{"package":{"name":"keepassxc","ecosystem":"Debian:13","purl":"pkg:deb/debian/keepassxc?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.10+dfsg1-1","2.7.10+dfsg1-2","2.7.10+dfsg1-2.1","2.8.0+dfsg1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-118673.json"}},{"package":{"name":"keepassxc","ecosystem":"Debian:14","purl":"pkg:deb/debian/keepassxc?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.0+dfsg1-1"}]}],"versions":["2.7.10+dfsg1-1","2.7.10+dfsg1-2","2.7.10+dfsg1-2.1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-118673.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/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"}]}