CVE-2026-7531

UNKNOWN 0.0

Use-after-free in PQC hybrid key-share handling

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Use-after-free in PQC hybrid key-share handling. This is an incomplete-fix follow-up to CVE-2026-5460 (released in 5.9.1): a malicious TLS 1.3 server sending a truncated PQC hybrid KeyShare can still trigger the error cleanup path to operate on freed memory.

CWE	CWE-416
Vendor	wolfssl
Product	wolfssl
Published	Jun 25, 2026

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Affected Versions

wolfSSL / wolfSSL

5.8.0 ≤ 5.9.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/wolfSSL/wolfssl/pull/10327 wolfssl.com: https://www.wolfssl.com/docs/security-vulnerabilities/

Credits

Thai Duong (Calif.io / Anthropic)