CVE-2026-7259 (GCVE-0-2026-7259)

Vulnerability from cvelistv5 – Published: 2026-05-10 04:13 – Updated: 2026-05-11 13:13
VLAI
Title
Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()
Summary
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to  a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().
Severity
2.1 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/AU:Y/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 13:12 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
php CNA under the mitre root
CNA scorecard B 80/100 over 25 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
PHP Group PHP Affected: 8.2.* , < 8.2.31 (semver)
Affected: 8.3.* , < 8.3.31 (semver)
Affected: 8.4.* , < 8.4.21 (semver)
Affected: 8.5.* , < 8.5.6 (semver)
guessed Create a notification for this product.
Date Public
2026-05-07 00:00
Credits
Viet Hoang Luu (The University of Melbourne) Amirmohammad Pasdar (The University of Melbourne) Wachiraphan Charoenwet (The University of Melbourne) Shaanan Cohney (The University of Melbourne) Toby Murray (The University of Melbourne) Van-Thuan Pham (The University of Melbourne) Ilija Tovilo
Show details on NVD website
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                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-10T04:13:26.766Z",
            "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
            "shortName": "php"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75"
            }
          ],
          "source": {
            "advisory": "GHSA-wm6j-2649-pv75",
            "discovery": "EXTERNAL"
          },
          "title": "Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
        "assignerShortName": "php",
        "cveId": "CVE-2026-7259",
        "datePublished": "2026-05-10T04:13:26.766Z",
        "dateReserved": "2026-04-28T05:07:03.118Z",
        "dateUpdated": "2026-05-10T04:13:26.766Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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