{"id":"CVE-2026-116739","aliases":["DEBIAN-CVE-2026-116739","EUVD-2026-110487","GHSA-qvwh-gpqc-cpp8","UBUNTU-CVE-2026-116739"],"status":"published","title":"VMime through 0.9.2 Uninitialized Stack Memory Disclosure via uuencode Decoder","description":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00252,"percentile":0.16806,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-908"],"published":"2026-10-26T21:52:38Z","modified":"2026-11-04T15:18:57Z","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#L311","tags":["technical-description","article","report"]},{"url":"https://hackmd.io/@haindpwn/vmime-uuencode-decoder-oob-write","tags":["third-party-advisory","exploit","advisory","report"]},{"url":"https://www.vulncheck.com/advisories/vmime-through-0.9.2-uninitialized-stack-memory-disclosure-via-uuencode-decoder","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116739","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qvwh-gpqc-cpp8"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116739.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-116739","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-116739","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-116739","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-116739","title":"VMime through 0.9.2 Uninitialized Stack Memory Disclosure via uuencode Decoder","description":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.","status":"published","published":"2026-10-26T21:52:38.496Z","modified":"2026-11-04T15:18:57.296Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-908"],"updated_at":"2026-11-04T16:33:47.459854Z"}],"euvd":[{"id":"EUVD-2026-110487","description":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.","status":"published","published":"2026-10-26T21:52:38Z","modified":"2026-11-04T15:18:57Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-04T16:10:35.925015Z"}],"ghsa":[{"id":"GHSA-qvwh-gpqc-cpp8","title":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode...","description":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.","status":"published","published":"2026-10-27T00:32:47Z","modified":"2026-10-27T00:32:48Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/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":"medium"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-908"],"updated_at":"2026-11-02T15:14:27.349207Z"}],"nvd":[{"id":"CVE-2026-116739","description":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.","status":"published","published":"2026-10-26T22:16:58.243Z","modified":"2026-11-04T16:17:43.587Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/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":"medium","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-908"],"updated_at":"2026-11-04T18:06:23.753671Z"}],"osv":[{"id":"CVE-2026-116739","title":"VMime through 0.9.2 Uninitialized Stack Memory Disclosure via uuencode Decoder","description":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.","status":"published","published":"2026-10-26T21:52:38.496Z","modified":"2026-11-06T01:07:25.754324307Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-908"],"updated_at":"2026-11-06T01:32:47.895286Z"},{"id":"DEBIAN-CVE-2026-116739","description":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.","status":"published","published":"2026-10-26T22:16:58.243Z","modified":"2026-11-05T10:01:12.006970726Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/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":"medium"}],"updated_at":"2026-11-05T13:30:49.23793Z"},{"id":"UBUNTU-CVE-2026-116739","description":"VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.","status":"published","published":"2026-10-26T22:16:00Z","modified":"2026-11-05T04:42:49Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"},{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-05T13:33:25.727744Z"}]}}