GHSA-pchc-86f6-8758 — high GitHub Advisory (CVE-2026-26316) in npm/openclaw

Description

Summary

In affected versions, the optional BlueBubbles iMessage channel plugin could accept webhook requests as authenticated based only on the TCP peer address being loopback (127.0.0.1, ::1, ::ffff:127.0.0.1) even when the configured webhook secret was missing or incorrect. This does not affect the default iMessage integration unless BlueBubbles is installed and enabled.

Affected Packages / Versions

npm: openclaw < 2026.2.13
npm: @openclaw/bluebubbles < 2026.2.13

Details

If a deployment exposes the BlueBubbles webhook endpoint through a same-host reverse proxy (or an attacker can reach loopback via SSRF), an unauthenticated party may be able to inject inbound webhook events into the agent pipeline.

Fix Commit(s)

f836c385ffc746cb954e8ee409f99d079bfdcd2f
743f4b28495cdeb0d5bf76f6ebf4af01f6a02e5a (defense-in-depth)

Mitigations

Set a non-empty BlueBubbles webhook password.
Avoid deployments where a public-facing reverse proxy forwards to a loopback-bound Gateway without strong upstream authentication.

Thanks @MegaManSec (https://joshua.hu) of AISLE Research Team for reporting.

Basic information

Type: reviewed
Severity: high
Advisory on GitHub: Open advisory ↗
Repository advisory: Open repository advisory ↗
Source code: Browse source ↗
Published (advisory): 2026-02-17 21:33:51 UTC
Updated: 2026-02-20 16:44:14 UTC
GitHub reviewed: 2026-02-17 21:33:51 UTC
NVD published: 2026-02-19

Score	Percentile
0.08%	23.33%

CVSS Scores

Base score	Version	Severity	Vector
7.5	3.1	—	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. 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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.

Identifiers

Type	Value
GHSA	GHSA-pchc-86f6-8758 ↗
CVE	CVE-2026-26316 ↗

CWEs

CWE id	Name
CWE-863	Incorrect Authorization

Credits

MegaManSec (reporter)

Affected packages (2)

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

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
npm	openclaw	< 2026.2.13	2026.2.13	—
npm	@openclaw/bluebubbles	< 2026.2.13	2026.2.13	—

OpenClaw BlueBubbles webhook auth bypass via loopback proxy trust