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CVE-2026-42267

Kimai is an open-source time tracking application. From version 2.27.0 to before version 2.54.0, any ROLE_USER can create a tag with a formula string as its name (e.g. =SUM(54+51)) via POST /api/tags and assign it to a timesheet. When an admin exports timesheets to XLSX, ArrayFormatter.formatValue() joins tag names with implode() and returns the result unchanged. OpenSpout promotes any =-prefixed string to a FormulaCell, writing <f>SUM(54+51)</f> into the XLSX archive. Excel evaluates the formul
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2767d4ab6a144588927ff6027cf2ed3bb8809a39162f0142d679ce7b9f0f1dc4
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"kimai","vendor":"kimai","versions":[{"status":"affected","version":">= 2.27.0, < 2.54.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b51412bca6314af309bf5bdc79b280036cfa99e5cea120bb3216862a1a661deb · sha256:87464137079c2537… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.4,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b51412bca6314af309bf5bdc79b280036cfa99e5cea120bb3216862a1a661deb · sha256:87464137079c2537… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-1236","description":"CWE-1236: Improper Neutralization of Formula Elements in a CSV File","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b51412bca6314af309bf5bdc79b280036cfa99e5cea120bb3216862a1a661deb · sha256:87464137079c2537… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/kimai/kimai/releases/tag/2.54.0","tags":["x_refsource_MISC"],"url":"https://github.com/kimai/kimai/releases/tag/2.54.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b51412bca6314af309bf5bdc79b280036cfa99e5cea120bb3216862a1a661deb · sha256:87464137079c2537… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/kimai/kimai/security/advisories/GHSA-3xc2-h5r3-wv3r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b51412bca6314af309bf5bdc79b280036cfa99e5cea120bb3216862a1a661deb · sha256:87464137079c2537… · /containers/adp/0/references/0
{"name":"https://github.com/kimai/kimai/security/advisories/GHSA-3xc2-h5r3-wv3r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kimai/kimai/security/advisories/GHSA-3xc2-h5r3-wv3r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b51412bca6314af309bf5bdc79b280036cfa99e5cea120bb3216862a1a661deb · sha256:87464137079c2537… · /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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