{"id":"CVE-2026-116738","aliases":["DEBIAN-CVE-2026-116738","EUVD-2026-110486","GHSA-rhj9-fcgr-5r62","UBUNTU-CVE-2026-116738"],"status":"published","title":"VMime through 0.9.2 Stack-Based Buffer Overflow via uuencode Decoder","description":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00725,"percentile":0.54573,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-10-26T21:52:37Z","modified":"2026-11-04T03:30:26Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-8","0.9.2-8.1","0.9.2-8.2","0.9.2-8.2~exp1","0.9.2-9"]},{"source":"osv","ecosystem":"Debian:13","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-9"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.1-4","0.9.1-5build1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-3","0.9.2-3build1","0.9.2-5build2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-5build3","0.9.2-5ubuntu1","0.9.2-5ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-6build1","0.9.2-7","0.9.2-8","0.9.2-8build1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-8.1","0.9.2-8.1build1","0.9.2-8.2build1","0.9.2-8.2build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-9build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libvmime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-9","0.9.2-9build1"]}],"products":[{"vendor":"kisli","product":"vmime"}],"references":[{"url":"https://github.com/kisli/vmime/pull/363","tags":["issue-tracking","patch","fix","report"]},{"url":"https://github.com/kisli/vmime/commit/e85925eddc638939f0eeb7ee55ec047d04a760d8","tags":["patch","fix","report"]},{"url":"https://github.com/kisli/vmime","tags":["product","package","report"]},{"url":"https://github.com/kisli/vmime/blob/v0.9.2/src/vmime/utility/encoder/uuEncoder.cpp#L185-L190","tags":["technical-description","article","report"]},{"url":"https://hackmd.io/@haindpwn/vmime-uuencode-decoder-oob-write","tags":["third-party-advisory","advisory","report"]},{"url":"https://www.vulncheck.com/advisories/vmime-through-0.9.2-stack-based-buffer-overflow-via-uuencode-decoder","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116738","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-rhj9-fcgr-5r62"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116738.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-116738","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-116738","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-116738","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-116738","title":"VMime through 0.9.2 Stack-Based Buffer Overflow via uuencode Decoder","description":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","status":"published","published":"2026-10-26T21:52:37.804Z","modified":"2026-10-27T14:16:56.633Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:20:03.4818Z"}],"euvd":[{"id":"EUVD-2026-110486","description":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","status":"published","published":"2026-10-26T21:52:37Z","modified":"2026-10-27T14:16:56Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:59:23.601588Z"}],"ghsa":[{"id":"GHSA-rhj9-fcgr-5r62","title":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows...","description":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","status":"published","published":"2026-10-27T00:32:47Z","modified":"2026-10-27T00:32:53Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/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","level":"high"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:14:27.349207Z"}],"nvd":[{"id":"CVE-2026-116738","description":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","status":"published","published":"2026-10-26T22:16:58.09Z","modified":"2026-10-27T16:04:22.707Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/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","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:13:03.746397Z"}],"osv":[{"id":"CVE-2026-116738","title":"VMime through 0.9.2 Stack-Based Buffer Overflow via uuencode Decoder","description":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","status":"published","published":"2026-10-26T21:52:37.804Z","modified":"2026-10-29T07:26:19.488144056Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:44:56.675758Z"},{"id":"DEBIAN-CVE-2026-116738","description":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","status":"published","published":"2026-10-26T22:16:58.09Z","modified":"2026-10-29T09:00:06.252223741Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/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","level":"high"}],"updated_at":"2026-11-02T15:45:50.923612Z"},{"id":"UBUNTU-CVE-2026-116738","description":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","status":"published","published":"2026-10-26T22:16:00Z","modified":"2026-11-05T04:42:49Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-05T13:33:25.727744Z"}]}}