{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-91982","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-09-15T11:10:41.353Z","datePublished":"2026-09-15T15:18:26.212Z","dateUpdated":"2026-09-17T15:14:33.105Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-09-15T15:18:26.212Z"},"datePublic":"2026-08-31T00:00:00.000Z","title":"Vikunja before 2.6.0 TOTP Secret Disclosure via API","descriptions":[{"lang":"en","value":"Vikunja before 2.6.0 continues to expose the raw TOTP shared secret after enrollment through the GET /api/v1/user/settings/totp and /api/v1/user/settings/totp/qrcode endpoints without re-authentication. Attackers with a valid access token can read the secret, import it into their own authenticator, and generate valid codes indefinitely to defeat the second factor and enable account takeover."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Insufficiently Protected Credentials","cweId":"CWE-522","type":"CWE"}]}],"affected":[{"vendor":"go-vikunja","product":"vikunja","defaultStatus":"unaffected","packageURL":"pkg:golang/code.vikunja.io/api","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"2.6.0"},{"version":"2.6.0","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*","versionEndExcluding":"2.6.0"}]}]}],"metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-88f6-4rjv-x774","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-88f6-4rjv-x774)"},{"name":"VulnCheck Advisory: Vikunja before 2.6.0 TOTP Secret Disclosure via API","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/vikunja-before-2.6.0-totp-secret-disclosure-via-api"}],"credits":[{"lang":"en","value":"0xcelien","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-88f6-4rjv-x774","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T15:13:37.907700Z","id":"CVE-2026-91982","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":"2026-09-17T15:14:33.105Z"}}]}}