CVE-2026-91767
6.5
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| PHP Group | PHP | 8.2.* < 8.2.34 | affected |
| PHP Group | PHP | 8.3.* < 8.3.35 | affected |
| PHP Group | PHP | 8.4.* < 8.4.26 | affected |
| PHP Group | PHP | 8.5.* < 8.5.11 | affected |
Weaknesses
- CWE-122: CWE-122 Heap-based buffer overflow
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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