{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123497","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-06T00:45:39.026Z","datePublished":"2026-11-08T01:37:14.960Z","dateUpdated":"2026-11-08T01:37:14.960Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-08T01:37:14.960Z"},"datePublic":"2026-10-22T00:00:00.000Z","title":"Vikunja veans before 2.7.1 HTTPS to HTTP Downgrade in Server Discovery","descriptions":[{"lang":"en","value":"Vikunja veans before 2.7.1 contains a protocol downgrade vulnerability in serverCandidates that allows on-path attackers to force plain HTTP during veans init and login. Attackers can block HTTPS ports so discovery accepts an unverified HTTP response, capturing passwords, TOTP codes or bot tokens and persisting cleartext API traffic."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Cleartext Transmission of Sensitive Information","cweId":"CWE-319","type":"CWE"}]}],"affected":[{"vendor":"go-vikunja","product":"vikunja","defaultStatus":"unaffected","packageURL":"pkg:golang/code.vikunja.io/veans","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"2.7.1"},{"version":"2.7.1","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*","versionEndExcluding":"2.7.1"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.6,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wqw2-rgwv-99qx","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-wqw2-rgwv-99qx)"},{"name":"VulnCheck Advisory: Vikunja veans before 2.7.1 HTTPS to HTTP Downgrade in Server Discovery","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/vikunja-veans-before-2.7.1-https-to-http-downgrade-in-server-discovery"}],"x_generator":{"engine":"vulncheck-endgame"}}}}