TuxCare security update for phpoffice/phpspreadsheet (5 CVEs)

{
  "id": "8ef08eca18c7fcace2e98cc2ed38bfc2e5ffd02b35e5288e92458db7025958d0",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1783904633",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "TuxCare security update for phpoffice/phpspreadsheet (5 CVEs)",
    "summary": "TuxCare rebuilt phpoffice/phpspreadsheet to address 5 CVEs. Fixed in 4.5.0-p2+tuxcare.",
    "evidence": "osv:CLSA-2026-1783904633",
    "products": [
      {
        "name": {
          "value": "phpoffice/phpspreadsheet",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.5.0-p2+tuxcare",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "4.5.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.5.0-p1+tuxcare",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1783904633",
      "aliases": [
        "CLSA-2026-1783904633"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.5.0"
                },
                {
                  "fixed": "4.5.0-p2+tuxcare"
                }
              ]
            }
          ],
          "package": {
            "name": "phpoffice/phpspreadsheet",
            "purl": "pkg:composer/phpoffice/phpspreadsheet",
            "ecosystem": "TuxCare:Packagist"
          },
          "versions": [
            "4.5.0",
            "4.5.0-p1+tuxcare"
          ],
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_lang/packagist/CLSA-2026-1783904633.json",
            "tuxcare": {
              "base_version": "4.5.0",
              "fixed_version": "4.5.0-p2+tuxcare"
            }
          }
        }
      ],
      "modified": "2026-10-15T09:47:47.850941230Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-34084",
        "CVE-2026-35453",
        "CVE-2026-40296",
        "CVE-2026-40863",
        "CVE-2026-40902"
      ],
      "references": []
    },
    "related_cves": [
      {
        "value": "CVE-2026-34084",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-35453",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-40296",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-40863",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-40902",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 328759,
  "published_at": "2026-08-04T14:52:43+00:00"
}