Vulnerability Details CVE-2026-7531
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 26.6%
CVSS Severity
CVSS v3 Score 9.8
References