{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-21879","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-01-05T17:24:36.928Z","datePublished":"2026-01-08T00:51:50.954Z","dateUpdated":"2026-01-08T18:34:42.665Z"},"containers":{"cna":{"title":"Kanboard vulnerable to Open Redirect via protocol-relative URLs","problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq"},{"name":"https://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519f","tags":["x_refsource_MISC"],"url":"https://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519f"},{"name":"https://github.com/kanboard/kanboard/releases/tag/v1.2.49","tags":["x_refsource_MISC"],"url":"https://github.com/kanboard/kanboard/releases/tag/v1.2.49"}],"affected":[{"vendor":"kanboard","product":"kanboard","versions":[{"version":"< 1.2.49","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-01-08T00:51:50.954Z"},"descriptions":[{"lang":"en","value":"Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below are vulnerable to an Open Redirect attack that allows malicious actors to redirect authenticated users to attacker-controlled websites. By crafting URLs such as //evil.com, attackers can bypass the filter_var($url, FILTER_VALIDATE_URL) validation check. This vulnerability could be exploited to conduct phishing attacks, steal user credentials, or distribute malware. The issue is fixed in version 1.2.49."}],"source":{"advisory":"GHSA-mhv9-7m9w-7hcq","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-08T18:34:32.575700Z","id":"CVE-2026-21879","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":"2026-01-08T18:34:42.665Z"}}]}}