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CVE-2026-59933

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the OLE reader follows sector chains from attacker-controlled XLS/OLE metadata without detecting cycles or enforcing a maximum chain length. A tiny malformed .xls/OLE file can set the small-block depot sector chain to point back to itself. During normal XLS detection, OLERead:
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bde997ead8c1642a2816e7873179f44b5bfa0e1c1e1aae74031b7ea6bded2b85
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-835","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"PhpSpreadsheet","vendor":"PHPOffice","versions":[{"status":"affected","version":">= 4.0.0, < 5.8.1"},{"status":"affected","version":">= 3.3.0, < 3.10.7"},{"status":"affected","version":">= 2.2.0, < 2.4.7"},{"status":"affected","version":">= 2.0.0, < 2.1.18"},{"status":"affected","version":"< 1.30.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-835","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/problemTypes/1/descriptions/0

Source references

8 source assertions
{"name":"https://github.com/PHPOffice/PhpSpreadsheet/commit/85f2556b0bf5269061bf45932ecda8a128d81750","tags":["x_refsource_MISC"],"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/85f2556b0bf5269061bf45932ecda8a128d81750"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/references/1
{"name":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.6","tags":["x_refsource_MISC"],"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/references/2
{"name":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.18","tags":["x_refsource_MISC"],"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.18"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/references/3
{"name":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.7","tags":["x_refsource_MISC"],"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/references/4
{"name":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.7","tags":["x_refsource_MISC"],"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/references/5
{"name":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.8.1","tags":["x_refsource_MISC"],"url":"https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.8.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/references/6
{"tags":["exploit"],"url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-xh5m-36r6-47m3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/adp/0/references/0
{"name":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-xh5m-36r6-47m3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-xh5m-36r6-47m3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a3d48f18a548f93e91419486037b4e52c773064dfb55b77ab7a6904ad2bf99 · sha256:acbfae94d85ad6a4… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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