CVE-2026-126308
Coder 2.38.0 before 2.38.2 Session Token Leak via Sub-Agent External Apps
CVSS Score
7.7
EPSS Score
0.0%
EPSS Percentile
0th
The web dashboard in Coder 2.24.0 before 2.29.23, 2.30.0 before 2.34.14, 2.35.0 before 2.36.9, 2.37.0 before 2.37.6, and 2.38.0 before 2.38.2 replaces the $SESSION_TOKEN placeholder in external app URLs with a full-access API key without checking whether the app belongs to a sub-agent. Code running in a workspace can register a disguised sub-agent app with a custom protocol URL, so the owner's click sends their API key to an attacker-chosen destination.
| CWE | CWE-201 |
| Vendor | coder |
| Product | coder |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
coder / coder
2.38.0 < 2.38.2
coder / coder
2.37.0 < 2.37.6
coder / coder
2.36.0 < 2.36.9
coder / coder
2.30.0 < 2.34.14
coder / coder
2.24.0 < 2.29.23
coder / coder
2.35.0 < 2.36.0
References
Credits
🔍 manus-pi EhabY