Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/kisli/vmime
- https://github.com/kisli/vmime/blob/v0.9.2/src/vmime/utility/encoder/uuEncoder.c
- https://github.com/kisli/vmime/commit/e85925eddc638939f0eeb7ee55ec047d04a760d8
- https://github.com/kisli/vmime/pull/363
- https://hackmd.io/@haindpwn/vmime-uuencode-decoder-oob-write
- https://www.vulncheck.com/advisories/vmime-through-0.9.2-stack-based-buffer-over
FAQ
What is CVE-2026-116738?
CVE-2026-116738 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 ca...
How severe is CVE-2026-116738?
CVE-2026-116738 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-116738?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.