{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "last_affected": "0x1FFFFFFFF"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "4f06e773c8c7e4b8430cfcf378fcd318a57f3742"
            }
          ],
          "repo": "https://github.com/php/php-src",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-j3wh-g957-2m85"
  ],
  "database_specific": {
    "cna_assigner": "php",
    "cwe_ids": [
      "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6103.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "range": [
              {
                "introduced": "8.2.*"
              },
              {
                "fixed": "8.2.34"
              },
              {
                "introduced": "8.3.*"
              },
              {
                "fixed": "8.3.35"
              },
              {
                "introduced": "8.4.*"
              },
              {
                "fixed": "8.4.26"
              },
              {
                "introduced": "8.5.*"
              },
              {
                "fixed": "8.5.11"
              }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
          }
        ]
      }
    ]
  },
  "details": "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.",
  "id": "CVE-2026-6103",
  "modified": "2026-10-28T02:30:28.578398787Z",
  "published": "2026-09-25T20:08:49.333Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6103.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/php/php-src/security/advisories/GHSA-j3wh-g957-2m85"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6103"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Phar TAR phar_tar_number() Integer Overflow - Archive Entry Injection"
}