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CVE Record

CVE-2026-34679: CAI Content Credentials | Improper Input Validation (CWE-20)

CAI Content Credentials versions c2pa-web@0.7.0, c2pa-v0.78.2 and earlier are affected by an Improper Input Validation 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.

MediumCVSS 6.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A flaw in Adobe’s Content Credentials JavaScript and Rust SDKs can crash applications that process invalid input, disrupting service. It does not expose or alter data according to the supplied CVSS assessment. No user interaction is required, but the attack vector is rated local rather than network-based.

Executive priority

Treat this as a prompt maintenance priority for systems where application downtime affects customers or critical workflows. Expedite remediation for services processing untrusted content; otherwise include it in the next controlled patch cycle. There is no supplied evidence of data theft, data modification, or active exploitation.

Technical view

CVE-2026-34679 is an improper input validation issue (CWE-20) affecting c2pa-web 0.7.0 and c2pa Rust 0.78.2 and earlier. Crafted invalid input can terminate the consuming application, causing denial of service. CVSS 3.1 is 6.2, with high availability impact and no stated confidentiality or integrity impact.

Likely exposure

Exposure is limited to applications using the affected Content Credentials SDK versions. Risk is greater where these applications process untrusted or externally supplied content. The supplied evidence does not establish that every application using these libraries exposes a reachable attack path.

Exploitation context

Exploitation requires no privileges or user interaction, but the CVSS vector classifies access as local. The source bundle does not establish active exploitation or public exploit availability, and the CVE is not identified as a CISA KEV entry.

Researcher notes

The stated impact is application denial of service from improper input validation. CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The bundle names affected versions through c2pa-web 0.7.0 and c2pa 0.78.2, while its version-range data points to 0.7.1 and 0.80.1 as remediation boundaries.

Mitigation direction

  • Upgrade c2pa-web to 0.7.1 or a later vendor-supported release.
  • Upgrade the Rust c2pa SDK to 0.80.1 or a later vendor-supported release.
  • Apply Adobe’s advisory guidance and redeploy affected applications.
  • Restrict untrusted Content Credentials input until affected components are updated.

Validation and detection

  • Inventory application manifests and lockfiles for c2pa-web and Rust c2pa dependencies.
  • Confirm deployed dependency versions, including transitive and bundled copies.
  • Verify JavaScript deployments use c2pa-web 0.7.1 or later.
  • Verify Rust deployments use c2pa 0.80.1 or later.
  • Run availability-focused regression tests with invalid input in an isolated environment.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-20: Exact CWE lookup

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cve · low confidence lookup

CVE-2026-34679 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.2 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
2Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.2CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H2.53.6adobe

Vulnerability scoring details

Base CVSS 3.1 score

6.2Medium
CVSS 3.1 vector shape for CVE-2026-34679Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
AdobeContent Credentials JS SDK0, @contentauth/c2pa-web@0.7.1unaffected
AdobeContent Credentials Rust SDK0, c2pa-v0.80.1unaffected
Weakness

CWE details

CWE-20

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.