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.

Project Subscriptions

Vendors Products
Ytnef Project Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 15 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title ytnef through 2.1.2 Heap Out-of-Bounds Read via DecompressRTF
First Time appeared Ytnef Project
Ytnef Project ytnef
Weaknesses CWE-125
CPEs cpe:2.3:a:ytnef_project:ytnef:*:*:*:*:*:*:*:*
Vendors & Products Ytnef Project
Ytnef Project ytnef
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-15T18:57:36.084Z

Reserved: 2026-10-15T17:03:58.228Z

Link: CVE-2026-111145

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-15T19:17:28.873

Modified: 2026-10-15T19:17:28.873

Link: CVE-2026-111145

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses