CVE-2026-116739

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/kisli/vmime
https://github.com/kisli/vmime/blob/v0.9.2/src/vmime/utility/encoder/uuEncoder.cpp#L311
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-uninitialized-stack-memory-disclosure-via-uuencode-decoder

Configurations

No configuration.

History

26 Oct 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-26 22:16

Updated : 2026-10-27 16:04

NVD link : CVE-2026-116739

Mitre link : CVE-2026-116739

CVE.ORG link : CVE-2026-116739

JSON object : View

Products Affected

No product.

CWE

CWE-908

Use of Uninitialized Resource

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