CVE-2026-89277 Overview
CVE-2026-89277 is an integer overflow or wraparound vulnerability [CWE-190] in Adobe CAI Content Credentials that can trigger an application denial-of-service condition. An attacker exploiting this flaw can crash the application, disrupting availability for users relying on content authenticity workflows. Exploitation requires user interaction, meaning a victim must visit a maliciously crafted URL or interact with a compromised web page. Adobe published the issue through Security Advisory APSB26-147. The vulnerability carries a local attack vector and does not permit disclosure of confidential data or modification of integrity, but it fully impacts availability of the affected component.
Critical Impact
Successful exploitation crashes the CAI Content Credentials application, producing a denial-of-service that interrupts content authenticity verification and provenance workflows.
Affected Products
- Adobe CAI Content Credentials (see Adobe Security Advisory APSB26-147 for affected versions)
- Applications and services integrating the Content Authenticity Initiative SDK
- Workflows that parse Content Credentials manifests from untrusted sources
Discovery Timeline
- 2026-09-22 - CVE-2026-89277 published to the National Vulnerability Database
- 2026-09-23 - Last updated in NVD database
Technical Details for CVE-2026-89277
Vulnerability Analysis
The flaw is classified under [CWE-190] Integer Overflow or Wraparound. Arithmetic performed on untrusted numeric fields inside the Content Credentials processing path can exceed the storage size of the destination integer type. When the value wraps, subsequent size calculations or memory operations reference an invalid range and terminate the process. The result is an application crash rather than code execution, consistent with the availability-only impact described by Adobe. Because Content Credentials data is typically embedded in media assets and manifests, a malicious file or web page can deliver the crafted values that trigger the wraparound. The advisory does not report confidentiality or integrity impact, and no exploit is publicly available at the time of writing.
Root Cause
The root cause is missing or insufficient validation of numeric inputs prior to arithmetic operations in the Content Credentials parser. Field lengths, offsets, or counters supplied by an attacker overflow the underlying integer type, producing values that violate parser invariants and destabilize the process.
Attack Vector
Exploitation is local and requires user interaction. A victim must open a maliciously crafted asset, visit a hostile URL, or interact with a compromised web page that delivers Content Credentials data to the vulnerable component. No authentication is required. The current EPSS probability is 0.251%.
No public proof-of-concept code is available. Refer to the Adobe Security Advisory APSB26-147 for vendor technical guidance.
Detection Methods for CVE-2026-89277
Indicators of Compromise
- Unexpected termination or crash reports from processes handling Content Credentials or C2PA manifests
- Windows Error Reporting or macOS CrashReporter entries referencing the CAI Content Credentials SDK
- Repeated processing failures tied to specific media files sourced from untrusted origins
Detection Strategies
- Monitor application crash telemetry for the affected Adobe components and correlate with recent file opens or browsing activity
- Inspect endpoint logs for abnormal termination signals following interaction with externally delivered images, video, or documents carrying Content Credentials
- Alert on repeated parser exceptions in build pipelines or media services that consume C2PA manifests
Monitoring Recommendations
- Ingest endpoint crash telemetry into your SIEM and baseline normal exit patterns for Content Credentials workflows
- Track downloads and URL visits that precede application crashes to identify malicious delivery infrastructure
- Review web proxy and email gateway logs for delivery of crafted media files following any confirmed crash event
How to Mitigate CVE-2026-89277
Immediate Actions Required
- Apply the updates listed in Adobe Security Advisory APSB26-147 to all systems running CAI Content Credentials
- Inventory applications that embed the Content Authenticity SDK and prioritize patching for endpoints that regularly process externally sourced media
- Instruct users to avoid opening Content Credentials assets or URLs from untrusted senders until patching completes
Patch Information
Adobe released fixed versions in Security Advisory APSB26-147. Consult the advisory for exact product builds and update instructions. Rebuild and redeploy any downstream applications that statically link the Content Authenticity SDK after upgrading the library.
Workarounds
- Restrict processing of Content Credentials data to trusted sources through allow-listing at web proxies and email gateways
- Disable or remove Content Credentials integrations in environments where the feature is not required
- Isolate media ingestion pipelines from production endpoints until patched builds are deployed
No vendor-approved configuration workaround is documented in the advisory; patching is the authoritative remediation path.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
