{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42604","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-29T00:31:15.725Z","datePublished":"2026-06-12T18:42:38.346Z","dateUpdated":"2026-06-15T13:10:30.083Z"},"containers":{"cna":{"title":"Actual has an OpenID `client_secret` Disclosure via Broken Authorization Guard in `/openid/config`","problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U","version":"4.0"}}],"references":[{"name":"https://github.com/actualbudget/actual/security/advisories/GHSA-49v6-pqjq-xw55","tags":["x_refsource_CONFIRM"],"url":"https://github.com/actualbudget/actual/security/advisories/GHSA-49v6-pqjq-xw55"},{"name":"https://actualbudget.org/blog/release-26.5.0","tags":["x_refsource_MISC"],"url":"https://actualbudget.org/blog/release-26.5.0"}],"affected":[{"vendor":"actualbudget","product":"actual","versions":[{"version":"< 26.5.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-12T18:42:38.346Z"},"descriptions":[{"lang":"en","value":"Actual is a local-first personal finance tool. The `POST /openid/config` endpoint in Actual Budget's sync-server versions <= 26.4.0 exposes the full OpenID Connect configuration—including the OAuth2 `client_secret`—to any caller who knows the bootstrap password. The endpoint also lacks authentication and rate limiting, making the bootstrap password brute-forceable. Version 26.5.0 fixes the issue."}],"source":{"advisory":"GHSA-49v6-pqjq-xw55","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-15T13:10:20.281043Z","id":"CVE-2026-42604","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-15T13:10:30.083Z"}}]}}