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CVE-2026-0859

TYPO3's mail‑file spool deserialization flaw lets local users with write access to the spool directory craft a malicious file that is deserialized during the mailer:spool:send command, enabling arbitrary PHP code execution on the web server. This issue affects TYPO3 CMS versions 10.0.0-10.4.54, 11.0.0-11.5.48, 12.0.0-12.4.40, 13.0.0-13.4.22 and 14.0.0-14.0.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3c0d1e863c84fd452f334c648fcb3967a415c58ee7280ab07fcddf570e7e00fd
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"collectionURL":"https://packagist.org","defaultStatus":"unaffected","modules":["Core"],"packageName":"typo3/cms-core","product":"TYPO3 CMS","repo":"https://github.com/TYPO3/typo3","vendor":"TYPO3","versions":[{"lessThan":"10.4.55","status":"affected","version":"10.0.0","versionType":"semver"},{"lessThan":"11.5.49","status":"affected","version":"11.0.0","versionType":"semver"},{"lessThan":"12.4.41","status":"affected","version":"12.0.0","versionType":"semver"},{"lessThan":"13.4.23","status":"affected","version":"13.0.0","versionType":"semver"},{"lessThan":"14.0.2","status":"affected","version…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:08183d90c38c9963e77e8613bd4495bd48ea989133318cec20e20e5ae2151f62 · sha256:132b8ae9de158dcc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":5.2,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:08183d90c38c9963e77e8613bd4495bd48ea989133318cec20e20e5ae2151f62 · sha256:132b8ae9de158dcc… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:08183d90c38c9963e77e8613bd4495bd48ea989133318cec20e20e5ae2151f62 · sha256:132b8ae9de158dcc… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Git commit of main branch","tags":["patch"],"url":"https://github.com/TYPO3/typo3/commit/3225d705080a1bde57a66689621c947da5a4782f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:08183d90c38c9963e77e8613bd4495bd48ea989133318cec20e20e5ae2151f62 · sha256:132b8ae9de158dcc… · /containers/cna/references/1
{"name":"Git commit of 12.4 branch","tags":["patch"],"url":"https://github.com/TYPO3/typo3/commit/722bf71c118b0a8e4f2c2494854437d846799a13"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:08183d90c38c9963e77e8613bd4495bd48ea989133318cec20e20e5ae2151f62 · sha256:132b8ae9de158dcc… · /containers/cna/references/3
{"name":"Git commit of 13.4 branch","tags":["patch"],"url":"https://github.com/TYPO3/typo3/commit/e0f0ceee480c203fbb60b87454f5f193e541d27f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:08183d90c38c9963e77e8613bd4495bd48ea989133318cec20e20e5ae2151f62 · sha256:132b8ae9de158dcc… · /containers/cna/references/2
{"tags":["vendor-advisory"],"url":"https://typo3.org/security/advisory/typo3-core-sa-2026-004"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:08183d90c38c9963e77e8613bd4495bd48ea989133318cec20e20e5ae2151f62 · sha256:132b8ae9de158dcc… · /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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