GHSA-jf75-p25m-pw74 CVE-2025-66411 GO-2025-4182

Coder logs sensitive objects unsanitized

Medium Go

Severity: 7.8 / 10; Medium · CVSS 3.1
Exploit chance (EPSS): 0.23%; Chance of exploitation in the next 30 days. Higher than 14.15% of scored vulnerabilities.
Known exploited: No; Not in CISA's catalog
Weakness: CWE-532 Insertion of Sensitive Information into Log File
Fix: 2.26.5; Upgrade github.com/coder/coder/v2 to this version or later

Description

Summary

Workspace Agent manifests containing sensitive values were logged in plaintext unsanitized

Details

By default Workspace Agent logs are redirected to stderr https://github.com/coder/coder/blob/a8862be546f347c59201e2219d917e28121c0edb/cli/agent.go#L432-L439

Workspace Agent Manifests containing sensitive environment variables were logged insecurely https://github.com/coder/coder/blob/7beb95fd56d2f790502e236b64906f8eefb969bd/agent/agent.go#L1090

An attacker with limited local access to the Coder Workspace (VM, K8s Pod etc.) or a third-party system (SIEM, logging stack) could access those logs

This behavior opened room for unauthorized access and privilege escalation

Impact

Impact varies depending on the environment variables set in a given workspace

Patches

Fix was released & backported:

Workarounds

One potential workaround is to disable Workspace Agent Logs by setting following configuration option CODER_AGENT_LOGGING_HUMAN=/dev/null

platform operators are advised to upgrade their deployments

Affected versions

Go

Package	Vulnerable	Fixed in
github.com/coder/coder	`all versions`	No fix yet
github.com/coder/coder/v2	`< 2.26.5`	`2.26.5`
github.com/coder/coder/v2	`>= 2.27.0, < 2.27.7`	`2.27.7`
github.com/coder/coder/v2	`>= 2.28.0, < 2.28.4`	`2.28.4`
github.com/coder/coder/v2	`< 2.26.5` `>= 2.27.0, < 2.27.7` `>= 2.28.0, < 2.28.4`	`2.26.5` `2.27.7` `2.28.4`

How to fix

Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.

github.com/coder/coder/v2 Go → `2.26.5`

go

go get github.com/coder/coder/v2@v2.26.5 && go mod tidy

Severity breakdown

CVSS 3.1 7.8

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Weakness

CWE-532: Insertion of Sensitive Information into Log File

The product writes sensitive information to a log file.

How to prevent it

Architecture and Design, Implementation: Consider seriously the sensitivity of the information written into log files. Do not write secrets into the log files.
Distribution: Remove debug log files before deploying the application into production.
Operation: Protect log files against unauthorized read/write.
Implementation: Adjust configurations appropriately when software is transitioned from a debug state to production.

References

Advisories

nvd.nist.gov/vuln/detail/CVE-2025-66411

Packages

github.com/coder/coder

Timeline

Dec 3, 2025 Published
Jun 17, 2026 Last updated by the source
Nov 1, 2026 Latest EPSS score

Advisory	Severity	Why it's related
GHSA-h58c-xccx-75m3 Coder: Stored HTML injection via unescaped ApplicationName and LogoURL appearance settings	Medium	Also affects github.com/coder/coder
GHSA-8fxq-53rx-ph5f Coder: Login endpoint user enumeration via timing-defense placeholder in password comparison	Medium	Also affects github.com/coder/coder
GHSA-qrwj-vh9x-gw5v Coder's workspace agent API insecure redirect handling allowed cross-agent file read and write	High	Also affects github.com/coder/coder
GHSA-5wg6-jmq2-53pw Coder's workspace app CORS origin check can be bypassed via UUID-based subdomain spoofing	Medium	Also affects github.com/coder/coder
GHSA-7qw2-f75v-62f7 Coder vulnerable to stored HTML injection via workspace agent logs in AgentLogLine component	Medium	Also affects github.com/coder/coder
GHSA-84rm-42xw-mx52 Coder's AI Bridge Proxy skips TLS certificate verification in default configuration	High	Also affects github.com/coder/coder
GHSA-wqxv-w64v-5wh6 Suspended Coder users retain access to AI Bridge LLM proxy endpoints	Medium	Also affects github.com/coder/coder
GHSA-f5vp-w269-392g Coder vulnerable to denial of service via unbounded request body in AI Bridge provider endpoints	Medium	Also affects github.com/coder/coder

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