CVE-2026-8621 Crabbox < v0.12.0 Authentication Bypass via Header Spoofing
Attackers can bypass authentication by spoofing identity headers to access other users' lease operations in Crabbox.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-8621?
CVE-2026-8621 is a high-severity authentication bypass vulnerability in openclaw crabbox, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Crabbox prior to v0.12.0 contains an authentication bypass vulnerability that allows non-admin shared-token callers to impersonate other owners or organizations by spoofing identity headers. Attackers can inject malicious X-Crabbox-Owner and X-Crabbox-Org headers in requests authenticated with a shared token to bypass authorization checks and access owner/org-scoped lease operations belonging to victim accounts.
Weakness: CWE-287
Which versions are affected by CVE-2026-8621?
3 open source packages ship an affected version, including github.com/openclaw/crabbox.
| Package | Affected | Fixed in |
|---|---|---|
github.com/openclaw/crabbox Go | All versions | 0.12.0 |
github.com/openclaw/crabbox Go | All versions | 0.12.0 |
github.com/openclaw/crabbox Go | All versions | 0.12.0 |
How do I fix CVE-2026-8621?
Upgrade github.com/openclaw/crabbox to 0.12.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-8621 being exploited?
There is no known exploitation of CVE-2026-8621 in the wild and no public exploit code.
Sources
Also known as GHSA-4g9m-rffv-h6wq, GO-2026-5120.