GHSA-5mx2-2mgw-x8rm — medium GitHub Advisory (CVE-2026-32896) in npm/openclaw

Description

Summary

BlueBubbles webhook auth in the optional beta iMessage plugin allowed a passwordless fallback path. In some reverse-proxy/local routing setups, this could allow unauthenticated webhook events.

Affected Component and Scope

Component: extensions/bluebubbles webhook handler
Scope: only deployments using the optional BlueBubbles plugin where webhook password auth was not configured for incoming webhook events

Affected Packages / Versions

Package: openclaw/openclaw (npm)
Latest published npm version at triage time (2026-02-21): 2026.2.19-2
Affected structured range: <=2026.2.19-2
Fixed on main; planned patched release: 2026.2.21 (>=2026.2.21)

Details

The vulnerable implementation had multiple auth branches, including a passwordless fallback with loopback/proxy heuristics.

The fix now uses one authentication codepath:
- inbound webhook token/guid must match channels.bluebubbles.password
- webhook target matching is consolidated to shared plugin-sdk logic
- BlueBubbles config validation now requires password when serverUrl is set

Impact

BlueBubbles is an optional beta iMessage plugin, and onboarding/channel-add flows already require a password. Practical exposure is mainly custom/manual configurations that omitted webhook password authentication.

Remediation

Upgrade to a release that includes this patch (>=2026.2.21, planned).
Ensure BlueBubbles webhook delivery includes a matching password (?password=<password> or x-password).

Fix Commit(s)

6b2f2811dc623e5faaf2f76afaa9279637174590
283029bdea23164ab7482b320cb420d1b90df806

Release Process Note

patched_versions is pre-set to the planned next release (2026.2.21) so once npm release is out, advisory publish can proceed without additional ticket edits.

OpenClaw thanks @zpbrent for reporting.

Basic information

Type: reviewed
Severity: medium
Advisory on GitHub: Open advisory ↗
Repository advisory: Open repository advisory ↗
Source code: Browse source ↗
Published (advisory): 2026-03-03 21:35:56 UTC
Updated: 2026-03-30 13:45:44 UTC
GitHub reviewed: 2026-03-03 21:35:56 UTC

Score	Percentile
0.08%	22.94%

CVSS Scores

Base score	Version	Severity	Vector
4.8	3.1	—	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.
6.3	4.0	—	`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network. Attack complexity (AC:H) Exploitation depends on constrained or hard-to-reproduce conditions. Attack requirements (AT:P) Additional preconditions must be present for exploitation. Privileges required (PR:N) No privileges are required. User interaction (UI:N) No user interaction is required. Vulnerable system confidentiality impact (VC:L) Limited confidentiality impact on the vulnerable system. Vulnerable system integrity impact (VI:L) Limited integrity impact on the vulnerable system. Vulnerable system availability impact (VA:N) No availability impact on the vulnerable system. Subsequent system confidentiality impact (SC:N) No confidentiality impact on subsequent systems. Subsequent system integrity impact (SI:N) No integrity impact on subsequent systems. Subsequent system availability impact (SA:N) No availability impact on subsequent systems.

Identifiers

Type	Value
GHSA	GHSA-5mx2-2mgw-x8rm ↗
CVE	CVE-2026-32896 ↗

CWEs

CWE id	Name
CWE-306	Missing Authentication for Critical Function

Credits

zpbrent (reporter)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
npm	openclaw	< 2026.2.21	2026.2.21	—

OpenClaw: BlueBubbles beta plugin webhook auth hardening (remove passwordless fallback)