CVE-2026-116739
VMime through 0.9.2 Uninitialized Stack Memory Disclosure via uuencode Decoder
- State
- Published
- Severity
- 5.3 Medium
- Published
- Oct 26, 2026
- Updated
- Oct 26, 2026
- Reserved
- Oct 26, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | 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 | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-908 Use of Uninitialized Resource
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#L311technical-description
- https://hackmd.io/@haindpwn/vmime-uuencode-decoder-oob-writethird-party-advisory
- VulnCheck Advisory: VMime through 0.9.2 Uninitialized Stack Memory Disclosure via uuencode Decoderthird-party-advisory
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