Open Redirect Vulnerability in Coder by Coder
CVE-2026-111931

5.3MEDIUM

Key Information:

Vendor

Coder

Status
Coder
Vendor
CVE Published:
17 October 2026

What is CVE-2026-111931?

An open redirect vulnerability exists in Coder versions prior to 2.34.8, affecting the handleAPIKeySmuggling feature. Unsanitized r.URL.Path values allow attackers to manipulate trusted workspace app subdomains. By crafting specific links with paths that begin with double slashes, adversaries can execute scheme-relative redirects to their phishing sites, leading to potential user compromise. This flaw emphasizes the necessity of input validation to secure web applications against such exploitative tactics.

Affected Version(s)

coder 2.0.0 < 2.34.8

coder 2.34.8

References

https://github.com/coder/coder/security/advisories/GHSA-9...
vendor-advisory
https://www.vulncheck.com/advisories/coder-2.0.0-before-2...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.