ANT-2026-VV0PRKKV · wolfSSL

heap-buffer-overflow medium

CVE-2026-5447

Severity Claude high · Security research firm medium · Maintainer -

Discovered by Claude Mythos Preview

SECURITY RESEARCH FIRM ANALYSIS

Triage and disclosure were performed by Calif.

Verdict
true positive
Severity
medium
TIMELINE

Dates from discovery through public reveal.

  1. 2026-03-27 Sent to maintainer
  2. 2026-03-27 Maintainer acknowledged
  3. 2026-03-27 Reported to tracker
  4. 2026-05-21 Patch released
  5. 2026-05-21 Publicly revealed
PROVENANCE

SHA-3-512 hash:

1bab7d8c0711e693bd53c3eec2b556b1ba8709ea1e4f3b0719a15ee8eaa70c89eeec4797e90b5ab922b7b8935bd6636effceefe31a976be0d557537919daab7d

Committed 2026-03-26 17:00 PT

Revealed 2026-05-21 16:00 PT

Verify (download preimage.json)

Show preimage JSON 
{
  "ant_id": "ANT-2026-VV0PRKKV",
  "bug_class": "heap-buffer-overflow",
  "claude_severity": "high",
  "commit_sha": null,
  "created_at": "2026-03-27T02:08:32+00:00",
  "description": null,
  "discovered_at": null,
  "location": null,
  "poc_sha256": null,
  "preimage_version": 1,
  "project": "wolfSSL",
  "reproduction": null,
  "technical_details": null,
  "title": null,
  "vendor_severity": "medium"
}