CVE-2026-116738
VMime through 0.9.2 Stack-Based Buffer Overflow via uuencode Decoder
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 26, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 26, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
vmimekisli |
|
References
- Pull Request #363issue-trackingpatch
- Patch Commitpatch
- https://github.com/kisli/vmimeproduct
- https://github.com/kisli/vmime/blob/v0.9.2/src/vmime/utility/encoder/uuEncoder.cpp#L185-L190technical-description
- https://hackmd.io/@haindpwn/vmime-uuencode-decoder-oob-writethird-party-advisory
- VulnCheck Advisory: VMime through 0.9.2 Stack-Based Buffer Overflow via uuencode Decoderthird-party-advisory
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