MEDIUM 6.9 NVD
CVE-2026-111146
ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed
ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed RTF properties. Attackers can deliver a crafted winmail.dat whose decompressed RTF lacks a NUL terminator, causing printf to over-read, crashing ytnefprint and leaking adjacent heap bytes.
References
- https://github.com/Yeraze/ytnef
- https://github.com/Yeraze/ytnef/blob/d9f089144414d3b0912c29ab96f8f1c591d00319/lib/ytnef.c#
- https://github.com/Yeraze/ytnef/blob/d9f089144414d3b0912c29ab96f8f1c591d00319/lib/ytnef.c#
- https://github.com/Yeraze/ytnef/issues/112
- https://hackmd.io/@haind-pwn/ytnef-decompressrtf-oob-read
This medium severity vulnerability with a CVSS score of 6.9 was published on 2026-10-15 via NVD.
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