CVE-2026-111145 ytnef through 2.1.2 Heap Out-of-Bounds Read via DecompressRTF
Attackers can crash the application or leak heap memory by sending a crafted TNEF attachment to applications using the ytnef library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-111145?
CVE-2026-111145 is a medium-severity memory corruption vulnerability in Yeraze ytnef, published on 15 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in DecompressRTF() in lib/ytnef.c that never validates uncompressedSize for uncompressed RTF streams. Attackers can supply a crafted winmail.dat TNEF attachment with a malicious PT_BINARY MAPI property to crash ytnefprint or libytnef callers and leak adjacent heap memory.
Weakness: CWE-125
Which versions are affected by CVE-2026-111145?
How do I fix CVE-2026-111145?
No fix has been published for CVE-2026-111145 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-111145 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111145 exists.
Sources
Also known as DEBIAN-CVE-2026-111145, GHSA-hjxh-c649-gvhr, UBUNTU-CVE-2026-111145.