CVE-2026-111927
Coder before 2.29.20, 2.33.0 before 2.33.12, 2.34.0 before 2.34.8, and 2.35.0 before 2.35.4 contains an improper hostname validation flaw in GetWorkspaceProxyB…
Impact
Coder before 2.29.20, 2.33.0 before 2.33.12, 2.34.0 before 2.34.8, and 2.35.0 before 2.35.4 contains an improper hostname validation flaw in GetWorkspaceProxyByHostname whose SIMILAR TO pattern performs a prefix match, so any domain that is a string prefix of a workspace-proxy access URL is trusted as a proxy. Attackers owning such a domain can lure an authenticated victim to a crafted /api/v2/applications/auth-redirect link, capture the redirected application_connect API key, and replay it to access the victim's workspace apps.
Affected products
| Product | Affected versions |
|---|---|
| Coder | before 2.29.20 |
| 2.33.0 | before 2.33.12 |
| 2.34.0 | before 2.34.8 |
| And 2.35.0 | before 2.35.4 |
Versions were read from the advisory text. No structured product data has been published for this record yet.