Maple Labs

CVE search · CVE-2026-91767

CVE-2026-91767

medium 6.5

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. The path is reachable from any default client stream, because verify_peer_name is enabled by default.

Open in the NVD CVE.org JSON

Details

Status
Analyzed
Published
Last changed
Source
security@php.net
Weakness
CWE-122

Severity

VersionScoreVectorSource
CVSS 3.1 medium 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N security@php.netSecondary
CVSS 3.1 medium 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H nvd@nist.govPrimary

Affected products

Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.

References