CVE-2026-126403

Coder 2.38.0 before 2.38.4 Authorization Bypass via External Agent Credentials Endpoint

High 8.5

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.

Key facts

Published: 13 Nov 2026
Last changed: 13 Nov 2026
Assigned by: VulnCheck
EPSS: 0.348% likely to be exploited in the next 30 days, higher than 28.851% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: none; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

8.5CVSS 4.0, Highfrom the CNA (VulnCheck)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
6.5CVSS 3.1, Mediumfrom the CNA (VulnCheck)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
coder	coder	Default status: unaffected 2.38.0 up to but excluding 2.38.4 (affected) 2.38.4 (unaffected)
coder	coder	Default status: unaffected 2.37.0 up to but excluding 2.37.8 (affected) 2.37.8 (unaffected)
coder	coder	Default status: unaffected 2.36.0 up to but excluding 2.36.11 (affected) 2.36.11 (unaffected)
coder	coder	Default status: unaffected 2.30.0 up to but excluding 2.34.16 (affected) 2.34.16 (unaffected)
coder	coder	Default status: unaffected 2.26.0 up to but excluding 2.29.24 (affected) 2.29.24 (unaffected)
coder	coder	Default status: unaffected 2.35.0 up to but excluding 2.36.0 (affected) 2.36.0 (unaffected)

Timeline

13 Nov 2026 Published

Weakness

CWE-863

References

GitHub Security Advisory (GHSA-9frj-7f83-x984)vendor-advisory
VulnCheck Advisory: Coder 2.38.0 before 2.38.4 Authorization Bypass via External Agent Credentials Endpointthird-party-advisory