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CVE-2026-42604

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c8a73cdfb8e1aabb436cb109e4d867fdccd8b947a2963a03d85c5c21ed0bc752
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"actual","vendor":"actualbudget","versions":[{"status":"affected","version":"< 26.5.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:007949ba4be5bcee951acc35e553546fb62647f6a895fc0ce196a3730cfd9f22 · sha256:eef0016addf3276a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","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","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:007949ba4be5bcee951acc35e553546fb62647f6a895fc0ce196a3730cfd9f22 · sha256:eef0016addf3276a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:007949ba4be5bcee951acc35e553546fb62647f6a895fc0ce196a3730cfd9f22 · sha256:eef0016addf3276a… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://actualbudget.org/blog/release-26.5.0","tags":["x_refsource_MISC"],"url":"https://actualbudget.org/blog/release-26.5.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:007949ba4be5bcee951acc35e553546fb62647f6a895fc0ce196a3730cfd9f22 · sha256:eef0016addf3276a… · /containers/cna/references/1
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:007949ba4be5bcee951acc35e553546fb62647f6a895fc0ce196a3730cfd9f22 · sha256:eef0016addf3276a… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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