CVE-2026-44425 ShellHub: Crash-DoS via field injection in filter and sort-by parameters
Authenticated users can crash the ShellHub API by injecting malicious keys into filter and sort parameters, causing a denial of service.
- 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-2026-44425?
CVE-2026-44425 is a medium-severity denial of service vulnerability in shellhub-io shellhub, published on 13 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
ShellHub is a centralized SSH gateway. Prior to 0.24.2, the device list endpoint accepts user-controlled identifiers in the the name field of each filter property in the base64-encoded filter query parameter and the sort_by query parameter, which are then passed directly as BSON/SQL keys in the database layer without validation. Any authenticated user can craft payloads that cause the aggregation / query to fail and the API to return HTTP 500 with no body, with no rate limiting applied. This vulnerability is fixed in 0.24.2.
Which versions are affected by CVE-2026-44425?
3 open source packages ship an affected version, including github.com/shellhub-io/shellhub. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/shellhub-io/shellhub Go | All versions | 0.24.2 |
github.com/shellhub-io/shellhub Go | All versions | 0.24.2 |
github.com/shellhub-io/shellhub Go | All versions | 0.24.2 |
Products include Shellhub Shellhub.
How do I fix CVE-2026-44425?
Upgrade github.com/shellhub-io/shellhub to 0.24.2 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-44425 being exploited?
There is no known exploitation of CVE-2026-44425 in the wild and no public exploit code.
Other vulnerabilities in shellhub-io shellhub
- CVE-2026-44423 ShellHub: Cross-tenant IDOR in `GET /api/sessions/:uid` discloses SSH session data
- CVE-2026-44424 ShellHub: Cross-tenant IDOR in `GET /api/devices/:uid` discloses device data of any namespace
- CVE-2026-44426 ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check
Sources
Also known as GHSA-47r2-v3x6-wff9, GO-2026-5113.