CVE-2026-42604Disclosure

LOWCVSS 6.9 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-863

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets2 URLs

By indicator

Full discourse1 post

Vulmon Vulnerability Feed@VulmonFeeds136d
Disclosure
CVE-2026-42604 OpenID Configuration Exposure and Bootstrap Password Brute-Force ... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42604 Vulnerability Alert Subscriptions: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=1
Post summary
A new CVE, CVE-2026-42604, is announced, describing exposure of OpenID configuration and potential brute‑force of bootstrap passwords, with links to additional details but no evidence of exploitation or remediation.
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