CVE-2026-89277Network attack vectorHinoki check available

Application crash via unchecked BMFF subset addition

Published Sep 22, 2026 · Updated Sep 22, 2026

Integer overflow in Adobe Content Credentials through c2pa-v0.89.2 and c2patool-v0.26.70 allows attackers to crash applications. BmffHash::verify_self() adds attacker-controlled 64-bit exclusion-subset offsets and lengths without checking for wraparound during BMFF manifest validation. A victim must visit a crafted URL or compromised page that supplies a malicious MP4, MOV, HEIC, or AVIF asset; validation then aborts the consuming process.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Integer overflow in Adobe Content Credentials through c2pa-v0.89.2 and c2patool-v0.26.70 allows attackers to crash applications. BmffHash::verify_self() adds attacker-controlled 64-bit exclusion-subset offsets and lengths without checking for wraparound during BMFF manifest validation. A victim must visit a crafted URL or compromised page that supplies a malicious MP4, MOV, HEIC, or AVIF asset; validation then aborts the consuming process.

The record

CVE
CVE-2026-89277
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Adobe Inc.
Product
Content Credentials Rust SDK
Classifications
CWE-190, T1204.001, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=c2pa-v0.89.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Adobe Inc. · Content Credentials Rust SDKversion=0 <=c2pa-v0.89.2
Adobe Inc. · Content Credentials Command-Line Toolversion=0 <=c2patool-v0.26.70

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1204.001User Execution: Malicious Link
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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