CVE-2026-32896 | THREATINT

Description

The BlueBubbles webhook handler in OpenClaw versions prior to 2026.2.21 contains a passwordless fallback authentication path that allows unauthenticated webhook events in certain reverse-proxy or local routing configurations. Attackers can bypass webhook authentication by exploiting the loopback/proxy heuristics to send unauthenticated webhook events to the BlueBubbles plugin.

PUBLISHED Reserved 2026-03-16 | Published 2026-03-21 | Updated 2026-05-26 | Assigner VulnCheck

MEDIUM: 6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

MEDIUM: 4.8CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-306 Missing Authentication for Critical Function

Product status

Default status

unaffected

Any version before 2026.2.21

affected

2026.2.21 (semver)

unaffected

Credits

Peng Zhou (@zpbrent) reporter

References

github.com/...enclaw/security/advisories/GHSA-5mx2-2mgw-x8rm (GitHub Security Advisory (GHSA-5mx2-2mgw-x8rm)) third-party-advisory

github.com/...ommit/6b2f2811dc623e5faaf2f76afaa9279637174590 (Patch Commit #1) patch

github.com/...ommit/283029bdea23164ab7482b320cb420d1b90df806 (Patch Commit #2) patch

www.vulncheck.com/...wordless-fallback-in-bluebubbles-plugin (VulnCheck Advisory: OpenClaw < 2026.2.21 - Unauthenticated Webhook Access via Passwordless Fallback in BlueBubbles Plugin) third-party-advisory

cve.org (CVE-2026-32896)

nvd.nist.gov (CVE-2026-32896)

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