🛡️ CVE-2026-42604

⚪ Unknown ✅ No Known Exploit CWE-863 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Weakness class

CVE-2026-42604 is classified as CWE-863: Incorrect Authorization. An authorisation check runs but reaches the wrong conclusion, permitting actions it should refuse.

Affected software

CVE-2026-42604 is recorded against 1 package.

  • unknown

Timeline and source

Published on 12 June 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

actualbudget.org
github.com

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE CWE-863
Public Exploit ✅ No
Source NVD
Published 2026-06-12
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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