CVE-2026-105452 Docker Sandboxes egress proxy could forward unrecognized client credentials to managed hosts
Untrusted code in Docker Sandboxes can leak client credentials to attacker-controlled accounts via the egress proxy, exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105452?
CVE-2026-105452 is a medium-severity vulnerability in Docker Sandboxes, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Docker Sandboxes could forward a client-supplied credential alongside a credential injected by the host egress proxy. The proxy removed alternate credentials only when their values matched known sentinel values, so untrusted code in an authorized sandbox could supply an unrecognized credential in another supported authentication header. For affected upstream services, this could authenticate the request to an attacker-controlled account and expose data included in the request.
Weakness: CWE-200
Which versions are affected by CVE-2026-105452?
How do I fix CVE-2026-105452?
No fix has been published for CVE-2026-105452 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105452 being exploited?
There is no known exploitation of CVE-2026-105452 in the wild and no public exploit code.
Sources
Also known as GHSA-fgfm-3w9r-rfrc.