{"schema":"threatline.record/2","record":{"id":"CVE-2026-91767","aliases":["GHSA-xr7j-rvgx-xq5p"],"summary":"Heap-buffer-overflow in php_openssl_matches_wildcard_name on crafted server cert wildcard CN","details":"php_openssl_matches_wildcard_name() in ext/openssl/xp_ssl.c underflows the length argument passed to memchr() when a TLS server certificate presents a wildcard name whose literal characters are together longer than the hostname being verified. A malicious server presenting such a certificate makes the PHP client read up to SIZE_MAX bytes past the end of a heap allocation. 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