CVE-2026-36908Public exploit

Process crash via unchecked trun entry count

Published Jun 26, 2026 · Updated Jun 26, 2026

Resource exhaustion in Bento4 before 1.8.9 allows attackers to crash media-processing applications with a crafted MP4 file. AP4_TrunAtom passes an untrusted entry count to AP4_Array::EnsureCapacity, which attempts an approximately 32 GiB heap allocation and aborts when allocation fails. Exploitation requires a user or automated workflow to process the file, and the demonstrated consequence is termination of the parsing process.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Bento4 before 1.8.9 allows attackers to crash media-processing applications with a crafted MP4 file. AP4_TrunAtom passes an untrusted entry count to AP4_Array::EnsureCapacity, which attempts an approximately 32 GiB heap allocation and aborts when allocation fails. Exploitation requires a user or automated workflow to process the file, and the demonstrated consequence is termination of the parsing process.

The record

CVE
CVE-2026-36908
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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