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Heap-buffer-overflow in php_openssl_matches_wildcard_name on crafted server cert wildcard CN

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

BIT-libphp-2026-91767

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:BIT-libphp-2026-91767

libphp

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
8.2.34

Source reference: /affected/0/ranges

8.3.35

Source reference: /affected/0/ranges

8.4.26

Source reference: /affected/0/ranges

8.5.11

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "8.2.0"
          },
          {
            "fixed": "8.2.34"
          },
          {
            "introduced": "8.3.0"
          },
          {
            "fixed": "8.3.35"
          },
          {
            "introduced": "8.4.0"
          },
          {
            "fixed": "8.4.26"
          },
          {
            "introduced": "8.5.0"
          },
          {
            "fixed": "8.5.11"
          }
        ]
      }
    ],
    "package": {
      "name": "libphp",
      "purl": "pkg:bitnami/libphp",
      "ecosystem": "Bitnami"
    },
    "severity": [
      {
        "type": "CVSS_V3",
        "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
      }
    ],
    "database_specific": {
      "source": "https://github.com/bitnami/vulndb/tree/main/data/libphp/BIT-libphp-2026-91767.json"
    }
  }
]
Related CVEs
CVE-2026-91767

Source reference: /aliases

Publisher severity

medium

Source reference: /database_specific/severity

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-91767 · Medium

PHP

Event
#59717 · Revision 1
Added to Heist Feed
Publisher date
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