CVE-2026-42604

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 68% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.9
EG Score
6.9(medium)
EPSS
32.1%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 16, 2026

Advisory Details (2)

Auto-updated Jun 12, 2026
Patch available. Sources: github.
github Patch Available

OpenID `client_secret` Disclosure via Broken Authorization Guard in `/openid/config` · Advisory · actualbudget/actual · GitHub

https://github.com/actualbudget/actual/security/advisories/GHSA-49v6-pqjq-xw55
generic

Release 26.5.0 | Actual Budget

https://actualbudget.org/blog/release-26.5.0

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 62× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-14 22:38 UTCEG score recompute
  2. 2026-07-13 22:30 UTCEPSS rescore
  3. 2026-07-13 20:01 UTCEG score recompute
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 17:39 UTCEG score recompute
  6. 2026-07-12 05:46 UTCEPSS rescore
  7. 2026-07-11 15:17 UTCEG score recompute
  8. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-10 13:05 UTCEG score recompute
  10. 2026-07-09 19:10 UTCEPSS rescore
  11. 2026-07-09 09:03 UTCEG score recompute
  12. 2026-07-08 15:15 UTCEPSS rescore
  13. 2026-07-08 06:38 UTCEG score recompute
  14. 2026-07-07 13:46 UTCEPSS rescore
  15. 2026-07-07 02:51 UTCEG score recompute
  16. 2026-07-06 16:27 UTCEPSS rescore
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  18. 2026-07-06 02:23 UTCEPSS rescore
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  20. 2026-07-06 00:36 UTCEG score recompute
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  22. 2026-07-04 22:11 UTCEG score recompute
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-03 19:59 UTCEG score recompute
  25. 2026-07-02 17:48 UTCEG score recompute
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  1. 2026-07-01 15:29 UTCEG score recompute
  2. 2026-07-01 15:06 UTCEPSS rescore
  3. 2026-06-30 23:22 UTCEPSS rescore
  4. 2026-06-30 13:18 UTCEG score recompute
  5. 2026-06-29 14:06 UTCEPSS rescore
  6. 2026-06-29 09:24 UTCEG score recompute
  7. 2026-06-28 14:07 UTCEPSS rescore
  8. 2026-06-28 07:13 UTCEG score recompute
  9. 2026-06-28 04:56 UTCEPSS rescore
  10. 2026-06-27 04:58 UTCEG score recompute
  11. 2026-06-27 03:08 UTCEPSS rescore
  12. 2026-06-26 02:40 UTCEG score recompute
  13. 2026-06-25 13:49 UTCEPSS rescore
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  15. 2026-06-25 00:28 UTCEG score recompute
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 22:17 UTCEG score recompute
  18. 2026-06-23 21:33 UTCEPSS rescore
  19. 2026-06-22 19:14 UTCEG score recompute
  20. 2026-06-22 14:25 UTCEPSS rescore
  21. 2026-06-22 14:25 UTCEPSS rescore
  22. 2026-06-21 16:47 UTCEG score recompute
  23. 2026-06-21 14:56 UTCEPSS rescore
  24. 2026-06-21 14:56 UTCEPSS rescore
  25. 2026-06-21 01:59 UTCEPSS rescore
  26. 2026-06-20 14:24 UTCEG score recompute
  27. 2026-06-19 19:25 UTCEPSS rescore
  28. 2026-06-19 12:05 UTCEG score recompute
  29. 2026-06-18 17:52 UTCEPSS rescore
  30. 2026-06-18 17:52 UTCEPSS rescore
  31. 2026-06-18 09:36 UTCEG score recompute
  32. 2026-06-17 17:53 UTCEPSS rescore
  33. 2026-06-17 07:07 UTCEG score recompute
  34. 2026-06-16 17:52 UTCEPSS rescore
  35. 2026-06-16 04:49 UTCEG score recompute
  36. 2026-06-15 17:49 UTCEPSS rescore
  37. 2026-06-15 02:38 UTCEG score recompute
  38. 2026-06-14 00:27 UTCEG score recompute
  39. 2026-06-13 23:00 UTCEPSS rescore
  40. 2026-06-12 23:12 UTCEPSS rescore
  41. 2026-06-12 22:14 UTCEG score recompute
  42. 2026-06-12 22:13 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42604?
CVE-2026-42604 is a medium vulnerability published on June 12, 2026. 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…
When was CVE-2026-42604 disclosed?
CVE-2026-42604 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42604 actively exploited?
CVE-2026-42604 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42604?
CVE-2026-42604 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-42604?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42604, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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