---
id: "CVE-2026-111926"
kind: "vulnerability"
aliases: ["CVE-2026-111926"]
title: "Coder: unauthenticated agent debug server leaks workspace environment secrets"
severity: "medium"
cvss: 4.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["coder", "infrastructure", "secrets", "self-hosted", "workspaces"]
not_affected_if: ["no-secrets-in-template-env", "version-2.34.8-or-later"]
published_at: "2026-10-17T19:16:35+00:00"
first_seen_at: "2026-10-23T21:57:14+00:00"
updated_at: "2026-10-25T04:33:37+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111926", "first_seen_at": "2026-10-23T21:57:14+00:00"}]
---

# Coder: unauthenticated agent debug server leaks workspace environment secrets

Coder agents from 2.10.0 before 2.34.8 run an unauthenticated debug HTTP server on 127.0.0.1:2113. Its /debug/manifest endpoint returns template environment variable values, which can include cloud keys or registry tokens.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `coder version` on each workspace host or check the Coder server version and confirm it is below `2.34.8`.
- Check whether anything listens on 127.0.0.1:2113 on workspace machines, for example with `ss -ltnp | grep 2113`.

## Fix

- Upgrade Coder to `2.34.8` or later.
- Rotate any cloud keys or registry tokens that were set as template environment variables in affected workspaces.

## Timeline

- 2026-10-23T21:57:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111926

## From the sources

Coder from 2.10.0 before 2.34.8 has an unauthenticated agent debug HTTP server on 127.0.0.1:2113 whose /debug/manifest handler returns the full agent manifest, including template-provided environment variable values. A lower-privileged Unix user or process in the same workspace can query this endpoint to read credentials such as cloud keys or registry tokens.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_