CVE-2026-42604

MEDIUM EPSS 31.8%

Published Jun 12, 20263w ago · Modified Jun 17, 20262w ago

6.9 CVSS 4.0

Medium

Published Jun 12, 2026 3w ago

Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score

6.9

Exploitability

—

Impact

—

Vector string

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

31.8% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

References 2

actualbudget.org https://actualbudget.org/blog/release-26.5.0
github.com https://github.com/actualbudget/actual/security/advisories/GHSA-49v6-pqjq-xw55

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.