CVE-2026-116738 json
VMime through 0.9.2 Stack-Based Buffer Overflow via uuencode Decoder
published 2026-10-26 13 d ago modified 2026-10-27 12 d ago also EUVD-2026-110486
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- github.com/kisli/vmime@e85925e commit
- github.com/kisli/vmime#363 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 12 d ago
Exploit prediction
0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | 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 |
Affected products
- kisli vmime
Classification
- Weakness
-
- CWE-121 Stack-based Buffer Overflow
References
-
github.com
/kisli/vmime/pull/363
issue-tracking, patch
-
github.com
/kisli/vmime/commit/e85925eddc638939f0eeb7ee55ec047d04a760d8
patch
-
github.com
/kisli/vmime
product
-
github.com
/kisli/vmime/blob/v0.9.2/src/vmime/utility/encoder/uuEncoder.cpp#L185-L190
technical-description
-
hackmd.io
/@haindpwn/vmime-uuencode-decoder-oob-write
third-party-advisory
-
vulncheck.com
/advisories/vmime-through-0.9.2-stack-based-buffer-overflow-via-uuencode-decoder
third-party-advisory
Sources
- CVE List CVE-2026-116738
- NVD CVE-2026-116738
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