CVE-2026-126403

Coder 2.38.0 before 2.38.4 Authorization Bypass via External Agent Credentials Endpoint

Published Nov 13, 2026 CVSS 4.0 · 8.5 High EPSS n/a KEV · Not listed

Description

Coder 2.26.0 before 2.29.24, 2.30.0 before 2.34.16, 2.35.0 before 2.36.11, 2.37.0 before 2.37.8, and 2.38.0 before 2.38.4 contains an improper authorization flaw in the external agent credentials endpoint, which returns the workspace agent token to users with only workspace read access rather than ssh permission. Authenticated users with roles such as Template Admin or Organization Admin can use the token to read the owner's private Git SSH key and Git provider OAuth tokens, and impersonate the agent to receive the owner's sessions.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

coder

unaffected

Version	Status	Constraints
`2.38.0`	affected	< 2.38.4
`2.38.4`	unaffected	—

coder

unaffected

Version	Status	Constraints
`2.37.0`	affected	< 2.37.8
`2.37.8`	unaffected	—

coder

unaffected

Version	Status	Constraints
`2.36.0`	affected	< 2.36.11
`2.36.11`	unaffected	—

coder

unaffected

Version	Status	Constraints
`2.30.0`	affected	< 2.34.16
`2.34.16`	unaffected	—

coder

unaffected

Version	Status	Constraints
`2.26.0`	affected	< 2.29.24
`2.29.24`	unaffected	—

coder

unaffected

Version	Status	Constraints
`2.35.0`	affected	< 2.36.0
`2.36.0`	unaffected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/coder/coder/security/advisories/GHSA-9frj-7f83-x984
https://www.vulncheck.com/advisories/coder-2.38.0-before-2.38.4-authorization-bypass-via-external-agent-credentials-endpoint

History

Nov 13, 2026 9:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Coder 2.26.0 before 2.29.24, 2.30.0 before 2.34.16, 2.35.0 before 2.36.11, 2.37.0 before 2.37.8, and 2.38.0 before 2.38.4 contains an improper authorization flaw in the external agent credentials endpoint, which returns the workspace agent token to users with only workspace read access rather than ssh permission. Authenticated users with roles such as Template Admin or Organization Admin can use the token to read the owner's private Git SSH key and Git provider OAuth tokens, and impersonate the agent to receive the owner's sessions.
Title		Coder 2.38.0 before 2.38.4 Authorization Bypass via External Agent Credentials Endpoint
First Time appeared		Coder Coder coder
Weaknesses		CWE-863
CPEs		cpe:2.3:a:coder:coder::::::::
Vendors & Products		Coder Coder coder
References		https://github.com/coder/coder/security/advisories/GHSA-9frj-7f83-x984 https://www.vulncheck.com/advisories/coder-2.38.0-before-2.38.4-authorization-bypass-via-external-agent-credentials-endpoint
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}` cvssV4_0 `{'score': 8.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}`