How severe is CVE-2026-34667?

CVE-2026-34667 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-34667 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34667?

CVE-2026-34667 primarily affects Adobe C2pa. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-34667?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34667 have an EU (EUVD) identifier?

Yes. CVE-2026-34667 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29769.

When was CVE-2026-34667 published?

CVE-2026-34667 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-34667

Q: What is CVE-2026-34667?

CAI Content Credentials versions c2pa-web@0.7.0, c2pa-v0.78.2 and earlier are affected by an Integer Underflow (Wrap or Wraparound) vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue does not require user interaction.

CVE-2026-34667 is a medium-severity vulnerability in Adobe C2pa with a CVSS 3.x base score of 6.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-191.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29769
Weakness: CWE-191
Affected product: Adobe C2pa
Published: 2026-05-12
Last modified: 2026-06-17

Description

CAI Content Credentials versions [email protected], c2pa-v0.78.2 and earlier are affected by an Integer Underflow (Wrap or Wraparound) vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue does not require user interaction.

Frequently asked questions

What is CVE-2026-34667?: CAI Content Credentials versions [email protected], c2pa-v0.78.2 and earlier are affected by an Integer Underflow (Wrap or Wraparound) vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue does not require user interaction.
How severe is CVE-2026-34667?: CVE-2026-34667 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-34667 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34667?: CVE-2026-34667 primarily affects Adobe C2pa. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-34667?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34667 have an EU (EUVD) identifier?: Yes. CVE-2026-34667 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29769.
When was CVE-2026-34667 published?: CVE-2026-34667 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/content-authenticity-sdk/apsb26-53.html

Affected products (2)

cpe:2.3:a:adobe:c2pa:*:*:*:*:*:rust:*:*
cpe:2.3:a:adobe:c2pa-web:*:*:*:*:*:node.js:*:*

More vulnerabilities in Adobe C2pa

CVE-2026-34713 — High (CVSS 7.5): CAI Content Credentials versions [email protected], c2pa-v0.80.1 and earlier are affected by an Uncontrolled Resource…
CVE-2026-34712 — High (CVSS 7.5): CAI Content Credentials versions [email protected], c2pa-v0.80.1 and earlier are affected by an Improper Input Validation…
CVE-2026-34711 — High (CVSS 7.5): CAI Content Credentials versions [email protected], c2pa-v0.80.1 and earlier are affected by an Integer Overflow or…
CVE-2026-34665 — High (CVSS 7.5): CAI Content Credentials versions [email protected], c2pa-v0.78.2 and earlier are affected by an Uncontrolled Resource…
CVE-2026-47905 — Medium (CVSS 6.2): CAI Content Credentials versions [email protected], c2pa-v0.80.1 and earlier are affected by an Uncontrolled Resource…
CVE-2026-47904 — Medium (CVSS 6.2): CAI Content Credentials versions [email protected], c2pa-v0.80.1 and earlier are affected by an Uncontrolled Resource…

All CVEs affecting Adobe C2pa →

Other CWE-191 (Integer Underflow) vulnerabilities

CVE-2007-0063 — Critical (CVSS 10.0): Integer underflow in the DHCP server in EMC VMware Workstation before 5.5.5 Build 56455 and 6.x before 6.0.1 Build…
CVE-2026-53176 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: IB/isert: Reject login PDUs shorter than…
CVE-2026-37534 — Critical (CVSS 9.8): Integer underflow vulnerability in Open-SAE-J1939 thru commit b6caf884df46435e539b1ecbf92b6c29b345bdfe (2025-11-30) in…
CVE-2025-52471 — Critical (CVSS 9.8): ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. An integer underflow vulnerability has been…
CVE-2025-29909 — Critical (CVSS 9.8): CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures…
CVE-2024-47606 — Critical (CVSS 9.8): GStreamer is a library for constructing graphs of media-handling components. An integer underflow has been detected in…

Browse all CWE-191 (Integer Underflow) vulnerabilities →