Vulnerability-Lookup

CNVD-2026-42450

Vulnerability from cnvd - Published: 2026-10-19

Title

PHP缓冲区溢出漏洞

Description

PHP是一种广泛用于Web开发的开源服务器端脚本语言。 PHP存在缓冲区溢出漏洞，该漏洞源于ext/openssl/xp_ssl.c中的php_opensciipts_matches_wildcard_name()函数在处理TLS服务器证书通配符名称时，当字面字符总长度超过被验证主机名长度时，传递给memchr()的长度参数发生下溢所致，攻击者可利用该漏洞导致PHP客户端越界读取堆内存，造成敏感信息泄露。

Severity

高

Patch Name

PHP缓冲区溢出漏洞的补丁

Patch Description

Formal description

厂商已发布补丁修复漏洞，请广大用户及时下载更新： https://github.com/php/php-src/security/advisories/GHSA-xr7j-rvgx-xq5p

Reference

https://github.com/php/php-src/security/advisories/GHSA-xr7j-rvgx-xq5p

Impacted products

Name
['PHP Group PHP >=8.2.，< 8.2.34', 'PHP Group PHP >=8.3.，< 8.3.35', 'PHP Group PHP >=8.4.，< 8.4.26', 'PHP Group PHP >=8.5.，< 8.5.11']

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JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-91767",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-91767"
    }
  },
  "description": "PHP\u662f\u4e00\u79cd\u5e7f\u6cdb\u7528\u4e8eWeb\u5f00\u53d1\u7684\u5f00\u6e90\u670d\u52a1\u5668\u7aef\u811a\u672c\u8bed\u8a00\u3002\n\nPHP\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eext/openssl/xp_ssl.c\u4e2d\u7684php_opensciipts_matches_wildcard_name()\u51fd\u6570\u5728\u5904\u7406TLS\u670d\u52a1\u5668\u8bc1\u4e66\u901a\u914d\u7b26\u540d\u79f0\u65f6\uff0c\u5f53\u5b57\u9762\u5b57\u7b26\u603b\u957f\u5ea6\u8d85\u8fc7\u88ab\u9a8c\u8bc1\u4e3b\u673a\u540d\u957f\u5ea6\u65f6\uff0c\u4f20\u9012\u7ed9memchr()\u7684\u957f\u5ea6\u53c2\u6570\u53d1\u751f\u4e0b\u6ea2\u6240\u81f4\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4PHP\u5ba2\u6237\u7aef\u8d8a\u754c\u8bfb\u53d6\u5806\u5185\u5b58\uff0c\u9020\u6210\u654f\u611f\u4fe1\u606f\u6cc4\u9732\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u8865\u4e01\u4fee\u590d\u6f0f\u6d1e\uff0c\u8bf7\u5e7f\u5927\u7528\u6237\u53ca\u65f6\u4e0b\u8f7d\u66f4\u65b0\uff1a\r\nhttps://github.com/php/php-src/security/advisories/GHSA-xr7j-rvgx-xq5p",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-42450",
  "openTime": "2026-10-19",
  "patchDescription": "PHP\u662f\u4e00\u79cd\u5e7f\u6cdb\u7528\u4e8eWeb\u5f00\u53d1\u7684\u5f00\u6e90\u670d\u52a1\u5668\u7aef\u811a\u672c\u8bed\u8a00\u3002\r\n\r\nPHP\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eext/openssl/xp_ssl.c\u4e2d\u7684php_opensciipts_matches_wildcard_name()\u51fd\u6570\u5728\u5904\u7406TLS\u670d\u52a1\u5668\u8bc1\u4e66\u901a\u914d\u7b26\u540d\u79f0\u65f6\uff0c\u5f53\u5b57\u9762\u5b57\u7b26\u603b\u957f\u5ea6\u8d85\u8fc7\u88ab\u9a8c\u8bc1\u4e3b\u673a\u540d\u957f\u5ea6\u65f6\uff0c\u4f20\u9012\u7ed9memchr()\u7684\u957f\u5ea6\u53c2\u6570\u53d1\u751f\u4e0b\u6ea2\u6240\u81f4\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4PHP\u5ba2\u6237\u7aef\u8d8a\u754c\u8bfb\u53d6\u5806\u5185\u5b58\uff0c\u9020\u6210\u654f\u611f\u4fe1\u606f\u6cc4\u9732\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "PHP\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "PHP Group PHP \u003e=8.2.*\uff0c\u003c 8.2.34",
      "PHP Group PHP \u003e=8.3.*\uff0c\u003c 8.3.35",
      "PHP Group PHP \u003e=8.4.*\uff0c\u003c 8.4.26",
      "PHP Group PHP \u003e=8.5.*\uff0c\u003c 8.5.11"
    ]
  },
  "referenceLink": "https://github.com/php/php-src/security/advisories/GHSA-xr7j-rvgx-xq5p",
  "serverity": "\u9ad8",
  "submitTime": "2026-10-16",
  "title": "PHP\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2026-91767 (GCVE-0-2026-91767)

Vulnerability from cvelistv5 – Published: 2026-09-25 20:53 – Updated: 2026-09-28 13:31

Title

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

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.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-28 12:56 UTC

CWE

CWE-122 - Heap-based buffer overflow

Assigner

php CNA under the mitre root

CNA scorecard B 81/100 over 27 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/php/php-src/security/advisorie…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
PHP Group	PHP	Affected: 8.2.* , < 8.2.34 (semver) Affected: 8.3.* , < 8.3.35 (semver) Affected: 8.4.* , < 8.4.26 (semver) Affected: 8.5.* , < 8.5.11 (semver)

Date Public

2026-09-25 20:49

Credits

Mohamed Sayed (flex0geek) Jakub Zelenka Arnaud Le Blanc

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-91767",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-28T12:56:38.307648Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-28T13:31:31.640Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "ext-openssl",
          "product": "PHP",
          "vendor": "PHP Group",
          "versions": [
            {
              "lessThan": "8.2.34",
              "status": "affected",
              "version": "8.2.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.3.35",
              "status": "affected",
              "version": "8.3.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.4.26",
              "status": "affected",
              "version": "8.4.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.5.11",
              "status": "affected",
              "version": "8.5.*",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "reporter",
          "value": "Mohamed Sayed  (flex0geek)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Jakub Zelenka"
        },
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          "lang": "en",
          "type": "remediation developer",
          "value": "Arnaud Le Blanc"
        }
      ],
      "datePublic": "2026-09-25T20:49:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
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            }
          ],
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        }
      ],
      "impacts": [
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          "descriptions": [
            {
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
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          "descriptions": [
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      "providerMetadata": {
        "dateUpdated": "2026-09-25T20:53:42.587Z",
        "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
        "shortName": "php"
      },
      "references": [
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          "tags": [
            "vendor-advisory"
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          "url": "https://github.com/php/php-src/security/advisories/GHSA-xr7j-rvgx-xq5p"
        }
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      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Heap-buffer-overflow in php_openssl_matches_wildcard_name on crafted server cert wildcard CN",
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    "datePublished": "2026-09-25T20:53:42.587Z",
    "dateReserved": "2026-09-15T00:41:16.041Z",
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    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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