OpenClaw: BlueBubbles Webhook Missing Rate Limiting Enables Brute-Force Password Guessing

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.3 · CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-35623: 0.36% estimated exploitation activity in the next 30 days; percentile 29.98 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary BlueBubbles Webhook Missing Guess Rate Limiting Enables Brute-Force Guessing of Weak Webhook Password Affected Packages / Versions - Package: openclaw - Affected versions: <= 2026.3.24 - First patched version: 2026.3.25 - Latest published npm version at verification time: 2026.3.24 Details BlueBubbles webhook auth previously rejected wrong passwords without throttling repeated guesses, allowing brute-force attempts against weak webhook passwords. Commit 5e08ce36d522a1c96df2bfe88e39303ae2643d92 adds repeated-guess throttling before auth failure responses. Verified vulnerable on tag v2026.3.24 and fixed on main by commit 5e08ce36d522a1c96df2bfe88e39303ae2643d92. Fix Commit(s) - 5e08ce36d522a1c96df2bfe88e39303ae2643d92

Published by the source

27 Mar 2026, 22:31 UTC

Last modified by the source

18 Apr 2026, 01:11 UTC

Source last checked

26 Oct 2026, 12:48 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-xq8g-hgh6-87hv

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-xq8g-hgh6-87hv

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# Patch Next advisory brief: CVE-2026-35623

Advisory: OpenClaw: BlueBubbles Webhook Missing Rate Limiting Enables Brute-Force Password Guessing
IDs: CVE-2026-35623, GHSA-xq8g-hgh6-87hv
Record: https://patchnext.com/advisories/cve-2026-35623 (revision 3, source checked 26 Oct 2026, 12:48 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm openclaw: affected <= 2026.3.24

## Suggested inspection (read-only)
- `npm ls openclaw --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on openclaw.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-xq8g-hgh6-87hv (OSV record GHSA-xq8g-hgh6-87hv lists affected ranges: npm openclaw >=0 <=2026.3.24)
- Verified: https://github.com/advisories/GHSA-xq8g-hgh6-87hv (GitHub-reviewed advisory GHSA-xq8g-hgh6-87hv lists affected ranges: npm openclaw >=0 <=2026.3.24)

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