{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42267", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-26T11:53:27.706Z", "datePublished": "2026-05-08T03:28:52.226Z", "dateUpdated": "2026-05-08T12:58:12.770Z"}, "containers": {"cna": {"title": "Kimai: Formula Injection via tag names in XLSX export", "problemTypes": [{"descriptions": [{"cweId": "CWE-1236", "lang": "en", "description": "CWE-1236: Improper Neutralization of Formula Elements in a CSV File", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "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"}}], "references": [{"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"}, {"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"}], "affected": [{"vendor": "kimai", "product": "kimai", "versions": [{"version": ">= 2.27.0, < 2.54.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-08T03:28:52.226Z"}, "descriptions": [{"lang": "en", "value": "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 formula when the file is opened. This issue has been patched in version 2.54.0."}], "source": {"advisory": "GHSA-3xc2-h5r3-wv3r", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/kimai/kimai/security/advisories/GHSA-3xc2-h5r3-wv3r", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-08T12:57:49.978866Z", "id": "CVE-2026-42267", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-08T12:58:12.770Z"}}]}}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.27.0,2.54.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "kimai", "source": "cna", "vendor": "kimai"}, "product": "kimai", "vendor": "kimai"}], "created": "2026-05-08T05:30:45.938944+00:00", "updated": "2026-05-08T05:30:46.222296+00:00", "vendors": ["kimai", "kimai$PRODUCT$kimai"]}