{"id":"DEBIAN-CVE-2026-94184","details":"A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening.  Affects v5.0.8 through v6.6.6.","modified":"2026-09-24T09:00:17.624883164Z","published":"2026-09-21T15:17:38.547Z","upstream":["CVE-2026-94184"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-94184"}],"affected":[{"package":{"name":"fetchmail","ecosystem":"Debian:12","purl":"pkg:deb/debian/fetchmail?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.4.37-1","6.4.38-1","6.4.39-1","6.5.6-1","6.5.6-2","6.5.7-1","6.6.0-1","6.6.1-1","6.6.2-1","6.6.2-2","6.6.2-3","6.6.3-1","6.6.3-2","6.6.3-3","6.6.6-1","6.6.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94184.json"}},{"package":{"name":"fetchmail","ecosystem":"Debian:13","purl":"pkg:deb/debian/fetchmail?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.4.39-1","6.5.6-1","6.5.6-2","6.5.7-1","6.6.0-1","6.6.1-1","6.6.2-1","6.6.2-2","6.6.2-3","6.6.3-1","6.6.3-2","6.6.3-3","6.6.6-1","6.6.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94184.json"}},{"package":{"name":"fetchmail","ecosystem":"Debian:14","purl":"pkg:deb/debian/fetchmail?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.4.39-1","6.5.6-1","6.5.6-2","6.5.7-1","6.6.0-1","6.6.1-1","6.6.2-1","6.6.2-2","6.6.2-3","6.6.3-1","6.6.3-2","6.6.3-3","6.6.6-1","6.6.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-94184.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}