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4 vulnerabilities found for ytnef by Yeraze
CVE-2026-111146 (GCVE-0-2026-111146)
Vulnerability from nvd – Published: 2026-10-15 18:57 – Updated: 2026-10-15 19:45
VLAI
EPSS
VEX
Title
ytnef through 2.1.2 Heap Out-of-Bounds Read via MAPIPrint in lib/ytnef.c
Summary
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.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 19:38 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://hackmd.io/@haind-pwn/ytnef-decompressrtf-… | technical-descriptionexploit |
| https://github.com/Yeraze/ytnef/issues/112 | issue-tracking |
| https://github.com/Yeraze/ytnef/blob/d9f089144414… | technical-description |
| https://github.com/Yeraze/ytnef/blob/d9f089144414… | technical-description |
| https://github.com/Yeraze/ytnef | product |
| https://www.vulncheck.com/advisories/ytnef-throug… | third-party-advisory |
Impacted products
Date Public
2026-05-12 00:00
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CVE-2026-111145 (GCVE-0-2026-111145)
Vulnerability from nvd – Published: 2026-10-15 18:57 – Updated: 2026-10-21 01:20
VLAI
EPSS
VEX
Title
ytnef through 2.1.2 Heap Out-of-Bounds Read via DecompressRTF
Summary
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.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 01:20 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://hackmd.io/@haind-pwn/ytnef-decompressrtf-… | technical-descriptionexploit |
| https://github.com/Yeraze/ytnef/issues/112 | issue-tracking |
| https://github.com/Yeraze/ytnef/blob/d9f089144414… | technical-description |
| https://github.com/Yeraze/ytnef | product |
| https://www.vulncheck.com/advisories/ytnef-throug… | third-party-advisory |
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Date Public
2026-05-12 00:00
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CVE-2026-111146 (GCVE-0-2026-111146)
Vulnerability from cvelistv5 – Published: 2026-10-15 18:57 – Updated: 2026-10-15 19:45
VLAI
EPSS
VEX
Title
ytnef through 2.1.2 Heap Out-of-Bounds Read via MAPIPrint in lib/ytnef.c
Summary
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.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 19:38 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://hackmd.io/@haind-pwn/ytnef-decompressrtf-… | technical-descriptionexploit |
| https://github.com/Yeraze/ytnef/issues/112 | issue-tracking |
| https://github.com/Yeraze/ytnef/blob/d9f089144414… | technical-description |
| https://github.com/Yeraze/ytnef/blob/d9f089144414… | technical-description |
| https://github.com/Yeraze/ytnef | product |
| https://www.vulncheck.com/advisories/ytnef-throug… | third-party-advisory |
Impacted products
Date Public
2026-05-12 00:00
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CVE-2026-111145 (GCVE-0-2026-111145)
Vulnerability from cvelistv5 – Published: 2026-10-15 18:57 – Updated: 2026-10-21 01:20
VLAI
EPSS
VEX
Title
ytnef through 2.1.2 Heap Out-of-Bounds Read via DecompressRTF
Summary
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.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 01:20 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://hackmd.io/@haind-pwn/ytnef-decompressrtf-… | technical-descriptionexploit |
| https://github.com/Yeraze/ytnef/issues/112 | issue-tracking |
| https://github.com/Yeraze/ytnef/blob/d9f089144414… | technical-description |
| https://github.com/Yeraze/ytnef | product |
| https://www.vulncheck.com/advisories/ytnef-throug… | third-party-advisory |
Impacted products
Date Public
2026-05-12 00:00
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"timestamp": "2026-10-21T01:20:14.221753Z",
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"url": "https://hackmd.io/@haind-pwn/ytnef-decompressrtf-oob-read"
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"url": "https://github.com/Yeraze/ytnef/issues/112"
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"url": "https://github.com/Yeraze/ytnef/blob/d9f089144414d3b0912c29ab96f8f1c591d00319/lib/ytnef.c#L1554-L1563"
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"url": "https://github.com/Yeraze/ytnef"
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"name": "VulnCheck Advisory: ytnef through 2.1.2 Heap Out-of-Bounds Read via DecompressRTF",
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"url": "https://www.vulncheck.com/advisories/ytnef-through-2.1.2-heap-out-of-bounds-read-via-decompressrtf"
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