CVE-2026-71442Network attack vectorHinoki check available

Application crash via out-of-range timestamp conversion

Published Aug 25, 2026 · Updated Aug 27, 2026

Integer underflow in Adobe C2PA Tool 0.26.70 and earlier and Rust SDK 0.89.0 and earlier allows remote attackers to crash applications. The GeneralizedTime conversion calls expect on a DER conversion of an attacker-controlled PKCS#9 signing time, so a date outside 1970–9999 panics instead of returning an error. No authentication or user interaction is required when a network-facing application validates a crafted manifest; the reported consequence is an application crash with no confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Integer underflow in Adobe C2PA Tool 0.26.70 and earlier and Rust SDK 0.89.0 and earlier allows remote attackers to crash applications. The GeneralizedTime conversion calls expect on a DER conversion of an attacker-controlled PKCS#9 signing time, so a date outside 1970–9999 panics instead of returning an error. No authentication or user interaction is required when a network-facing application validates a crafted manifest; the reported consequence is an application crash with no confidentiality or integrity impact.

The record

CVE
CVE-2026-71442
Published
Aug 25, 2026
Updated
Aug 27, 2026
Vendor
Adobe
Product
C2PA Tool
Classifications
CWE-191, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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 <=c2patool-v0.26.70

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Adobe · C2PA Toolversion=0 <=c2patool-v0.26.70
Adobe · Content Credentials Rust SDKversion=0 <=c2pa-v0.89.0

Published CVSS scores

7.5AdobeCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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

No observations available

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

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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