CVE-2026-111931: Coder 2.0.0 before 2.34.8 Open Redirect via Workspace App Proxy

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-17 · updated 2026-10-19
Weakness: CWE-601

Description

Coder from 2.0.0 before 2.34.8 contains an open redirect vulnerability in handleAPIKeySmuggling that allows attackers to redirect users externally via unsanitized r.URL.Path values. Attackers can craft links on trusted workspace app subdomains with paths beginning with double slashes, which become scheme-relative redirects to attacker sites for phishing.

Affected products

coder: from 2.0.0 before 2.34.8 — fixed in 2.34.8

How to fix

Upgrade to a fixed version: coder 2.34.8. Check the vendor advisory for mitigations.

References

https://github.com/coder/coder/security/advisories/GHSA-98qx-9p2x-c4wh
https://www.vulncheck.com/advisories/coder-2.0.0-before-2.34.8-open-redirect-via-workspace-app-proxy

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