ANT-2026-SB4PHA43 · wolfSSL
crypto-failure high
Severity Claude high · Security research firm high · Maintainer -
Discovered by Claude Mythos Preview
Anthropic's analysis, sealed at approval. Disclosure to the maintainer was performed by Calif.
ANT-2026-SB4PHA43: ARIA-GCM Nonce Reuse in TLS 1.2 Record Encryption in wolfSSL
The ARIA-GCM implementation reuses nonces when encrypting TLS 1.2 records.
Target
Project: wolfSSL
Discovery: static analysis — not yet dynamically reproduced
Reproduction
This finding was identified by static analysis and has not yet been dynamically reproduced. A trigger input is not included.
[No reproducer or sanitizer output attached — request from cvd@anthropic.com if needed.]
Acknowledgement
This vulnerability was discovered by Claude, Anthropic's AI assistant, and triaged by the Anthropic security team in collaboration with Anthropic Research. Please direct questions to security-cvd@anthropic.com and reference ANT-2026-SB4PHA43.
Reference: ANT-2026-SB4PHA43
Anthropic CVD Policy: https://anthropic.com/security/cvd-policy
Triage and disclosure were performed by Calif.
- Verdict
- true positive
- Severity
- high
Dates from discovery through public reveal.
- 2026-03-29 Reported to tracker
- 2026-05-07 Sent to maintainer
- 2026-05-07 Patch released
- 2026-05-07 Maintainer acknowledged
- 2026-05-20 Publicly revealed
SHA-3-512 hash:
42db4adeeadfd87fee4e773a054ec682b406867ffe8d0e9cc84b22a2c51a7726959887e1bc23098eea81effa882b38313a69a5acc6a465e8d3162b57e754ed79
Committed 2026-05-07 00:03 PT
Revealed 2026-05-20 00:40 PT
Verify (download preimage.json)
Show preimage JSON
{
"ant_id": "ANT-2026-SB4PHA43",
"bug_class": "Cryptographic Nonce Reuse",
"claude_severity": "high",
"commit_sha": null,
"created_at": "2026-03-29T20:42:29+00:00",
"description": "The ARIA-GCM implementation reuses nonces when encrypting TLS 1.2 records.",
"discovered_at": null,
"location": null,
"poc_sha256": null,
"preimage_version": 1,
"project": "wolfSSL",
"reproduction": null,
"technical_details": null,
"title": "ARIA-GCM Nonce Reuse in TLS 1.2 Record Encryption in wolfSSL",
"vendor_severity": "high"
}