High-Risk CVE-2026-116738 in VMime Library Allows Remote Code Execution
Article Content
- •CVE-2026-116738 affects VMime library version 0.9.2 and earlier.
- •Attackers can exploit this vulnerability via crafted uuencoded email parts.
- •Immediate patching is recommended to prevent potential remote code execution.
A vulnerability, CVE-2026-116738, has been identified in the VMime library version 0.9.2, which contains an integer underflow in the uuEncoder::decode function. This flaw allows remote attackers to trigger a stack-based buffer overflow by sending crafted uuencoded MIME parts. The vulnerability affects systems that parse untrusted email, particularly internet-facing mail gateways and automated ingestion pipelines. Attackers can exploit this flaw without user interaction, potentially leading to application crashes or remote code execution. The CVSS score for this vulnerability is 8.7, indicating a high severity level. A patch has been released, and users are advised to upgrade immediately to mitigate the risk. Monitoring for decoder crashes and unusual memory faults is recommended until systems are patched. The vulnerability was published on October 26, 2026.
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