High-severity CVEs explode 3-4x after Claude Mythos launch, hitting 21.4k in Q3 2026
peterwildeford · x · 2026-11-13
peterwildeford highlights a sharp acceleration in high- and critical-severity vulnerability disclosures following Claude Mythos Preview (announced April 7, 2026). The chart, based on NIST NVD data, shows:
- Quarterly high/critical CVEs held steady at 3.5k–6.4k from 2022 through 2025;
- 2026 Q1 jumped to 8.8k, Q2 to 11.7k, Q3 hit 21.4k, with Q4 projected at 27k (extrapolated from 12,318 published through Nov 11);
- A 3–4x acceleration after Mythos' launch.
This reads as direct evidence of AI-driven vulnerability discovery at scale — AI is rewriting the security disclosure pipeline and raising remediation and governance pressure.
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