Vulnerability-Lookup

CNVD-2026-42449

Vulnerability from cnvd - Published: 2026-10-19

Title

PHP数字错误漏洞

Description

PHP是一种广泛用于Web开发的开源服务器端脚本语言。 PHP存在数字错误漏洞，该漏洞源于phar_tar_number()函数在解析TAR标头的八进制大小字段时未对uint32_t进行溢出检查，大小超过0xFFFFFFFF会发生回绕，导致解析器跳过错误的数据块数量并将攻击者控制的文件内容当作下一个TAR标头，攻击者可利用该漏洞注入特制归档条目并被PharData报告和提取为真实条目。

Severity

低

Patch Name

PHP数字错误漏洞的补丁

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-j3wh-g957-2m85

Reference

https://github.com/php/php-src/security/advisories/GHSA-j3wh-g957-2m85

Impacted products

Name
['PHP Group PHP >=8.2.0，<8.2.34', 'PHP Group PHP \r\n>=8.3.0，<8.3.35', 'PHP Group PHP \r\n>=8.4.0，<8.4.26', 'PHP Group PHP \r\n>=8.5.0，<8.5.11']

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-6103",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-6103"
    }
  },
  "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\u6570\u5b57\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ephar_tar_number()\u51fd\u6570\u5728\u89e3\u6790TAR\u6807\u5934\u7684\u516b\u8fdb\u5236\u5927\u5c0f\u5b57\u6bb5\u65f6\u672a\u5bf9uint32_t\u8fdb\u884c\u6ea2\u51fa\u68c0\u67e5\uff0c\u5927\u5c0f\u8d85\u8fc70xFFFFFFFF\u4f1a\u53d1\u751f\u56de\u7ed5\uff0c\u5bfc\u81f4\u89e3\u6790\u5668\u8df3\u8fc7\u9519\u8bef\u7684\u6570\u636e\u5757\u6570\u91cf\u5e76\u5c06\u653b\u51fb\u8005\u63a7\u5236\u7684\u6587\u4ef6\u5185\u5bb9\u5f53\u4f5c\u4e0b\u4e00\u4e2aTAR\u6807\u5934\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6ce8\u5165\u7279\u5236\u5f52\u6863\u6761\u76ee\u5e76\u88abPharData\u62a5\u544a\u548c\u63d0\u53d6\u4e3a\u771f\u5b9e\u6761\u76ee\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-j3wh-g957-2m85",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-42449",
  "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\u6570\u5b57\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ephar_tar_number()\u51fd\u6570\u5728\u89e3\u6790TAR\u6807\u5934\u7684\u516b\u8fdb\u5236\u5927\u5c0f\u5b57\u6bb5\u65f6\u672a\u5bf9uint32_t\u8fdb\u884c\u6ea2\u51fa\u68c0\u67e5\uff0c\u5927\u5c0f\u8d85\u8fc70xFFFFFFFF\u4f1a\u53d1\u751f\u56de\u7ed5\uff0c\u5bfc\u81f4\u89e3\u6790\u5668\u8df3\u8fc7\u9519\u8bef\u7684\u6570\u636e\u5757\u6570\u91cf\u5e76\u5c06\u653b\u51fb\u8005\u63a7\u5236\u7684\u6587\u4ef6\u5185\u5bb9\u5f53\u4f5c\u4e0b\u4e00\u4e2aTAR\u6807\u5934\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6ce8\u5165\u7279\u5236\u5f52\u6863\u6761\u76ee\u5e76\u88abPharData\u62a5\u544a\u548c\u63d0\u53d6\u4e3a\u771f\u5b9e\u6761\u76ee\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\u6570\u5b57\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "PHP Group PHP \u003e=8.2.0\uff0c\u003c8.2.34",
      "PHP Group PHP \r\n\u003e=8.3.0\uff0c\u003c8.3.35",
      "PHP Group PHP \r\n\u003e=8.4.0\uff0c\u003c8.4.26",
      "PHP Group PHP \r\n\u003e=8.5.0\uff0c\u003c8.5.11"
    ]
  },
  "referenceLink": "https://github.com/php/php-src/security/advisories/GHSA-j3wh-g957-2m85",
  "serverity": "\u4f4e",
  "submitTime": "2026-10-16",
  "title": "PHP\u6570\u5b57\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2026-6103 (GCVE-0-2026-6103)

Vulnerability from cvelistv5 – Published: 2026-09-25 20:08 – Updated: 2026-09-25 20:41

Title

Phar TAR phar_tar_number() Integer Overflow - Archive Entry Injection

Summary

phar_tar_number() parses the octal size field of a TAR header into a uint32_t with no overflow check. The field is 11 octal digits wide and holds values up to 0x1FFFFFFFF, so a size above 0xFFFFFFFF silently wraps. The parser then skips the wrong number of data blocks and interprets attacker-controlled file content as the next TAR header, which lets a crafted archive inject entries that PharData reports and extracts as if they were genuine.

Severity

4.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-25 20:41 UTC

CWE

CWE-190 - Integer overflow or wraparound

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)

Credits

@arnoldasr (GitHub) @Oblivionsage (GitHub) @OSTIF-Derek (GitHub) Jakub Zelenka Weilin Du

Show details on NVD website

JSON

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      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-6103",
                "options": [
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                  },
                  {
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-25T20:41:05.626504Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-09-25T20:41:27.115Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        "references": [
          {
            "tags": [
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            "url": "https://github.com/php/php-src/security/advisories/GHSA-j3wh-g957-2m85"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "vendor": "PHP Group",
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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.

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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.
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