CVE-2026-126403

EUVD-2026-125162

13.11.2026, 10:17

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
VulnCheck	CNA	6.5 MEDIUM	NETWORK	LOW	HIGH	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 34.98%

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).

Vendor	Product	Version	Source
coder	coder	2.38.0 ≤ 𝑥 < 2.38.4	CNA
coder	coder	2.37.0 ≤ 𝑥 < 2.37.8	CNA
coder	coder	2.36.0 ≤ 𝑥 < 2.36.11	CNA
coder	coder	2.30.0 ≤ 𝑥 < 2.34.16	CNA
coder	coder	2.26.0 ≤ 𝑥 < 2.29.24	CNA
coder	coder	2.35.0 ≤ 𝑥 < 2.36.0	CNA

Common Weakness Enumeration

CWE-863 - Incorrect Authorization
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

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