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CVE-2026-31839: CVE-2026-31839: Striae Integrity Bypass in Digital Confirmation Workflow

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CVE-2026-31839: Striae Integrity Bypass in Digital Confirmation Workflow

Vulnerability ID: CVE-2026-31839
CVSS Score: 8.2
Published: 2026-03-11

Striae versions prior to 3.0.0 suffer from a high-severity integrity bypass vulnerability in the digital confirmation workflow. The application relies on an unauthenticated hash-only validation model for exported forensic packages, allowing attackers to modify evidence and forge validation metadata without detection.

TL;DR

A design flaw in Striae < 3.0.0 allows attackers to modify forensic ZIP packages without detection by recalculating file hashes in the unauthenticated manifest, breaking the chain of custody.

⚠️ Exploit Status: POC

Technical Details

  • CWE ID: CWE-354
  • CVSS Score: 8.2
  • Attack Vector: Local
  • Impact: High Integrity, High Confidentiality
  • Privileges Required: None
  • Exploit Status: Proof of Concept

Affected Systems

  • Striae digital confirmation workflow
  • Striae export/import orchestrator
  • FORENSIC_MANIFEST.json parser
  • striae: >= 0.9.22-0, < 3.0.0 (Fixed in: 3.0.0)

Code Analysis

Commit: a4bc6f0

Fix Commit: Implement server-side signing and fail-closed import gates.

Commit: 2543cf8

Fix Commit (Shared Utils): Introduces JSON canonicalization and signature verification utilities.

Mitigation Strategies

  • Upgrade Striae to version 3.0.0 or later.
  • Reject and re-evaluate any forensic packages lacking a version 2.0 signed manifest.
  • Monitor audit logs for failed manifestSignatureValid events during import operations.

Remediation Steps:

  1. Download and install Striae version 3.0.0.
  2. Update Cloudflare Workers configuration (compatibility_date: 2026-03-09) to support the required Web Crypto API features.
  3. Provision and securely store MANIFEST_SIGNING_PRIVATE_KEY on the server-side worker.
  4. Distribute the corresponding MANIFEST_SIGNING_PUBLIC_KEY to the client application for verification.
  5. Audit historical case imports to identify confirmation packages processed prior to version 3.0.0.

References

Read the full report for CVE-2026-31839 on our website for more details including interactive diagrams and full exploit analysis.

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