CVE-2026-95121 json
An issue in mp4v2 2.0.0 allows an attacker to execute arbitrary code via the MP4RtpAtom::ReadHntiType() in src/atom_rtp.cpp.
published 30d ago modified 26d ago also EUVD-2026-98805
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
An issue in mp4v2 2.0.0 allows an attacker to execute arbitrary code via the MP4RtpAtom::ReadHntiType() in src/atom_rtp.cpp. A specially crafted MP4 file can cause an undersized rtp atom to produce a near-2^64 allocation size through an unchecked offset subtraction
Patch / fix
- github.com/TechSmith/mp4v2#100 pull request
- github.com/TechSmith/mp4v2#100 pull request
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 28d ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/TechSmith/mp4v2/issues/98 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
References
Sources
- CVE List CVE-2026-95121
- NVD CVE-2026-95121
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