CVE-2026-126405

EUVD-2026-125160

13.11.2026, 10:17

Coder 2.21.0 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 reads Web Push endpoint responses in webpushSend with io.ReadAll, without a size limit or client timeout. Any authenticated user can register a subscription via POST /api/v2/users/{user}/webpush/subscription pointing to a server returning an endless body, exhausting coderd memory and crashing the API, dashboard, and workspace connections.

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

Base Score

CVSS 3.x

EPSS Score

Percentile: 38.36%

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	2.21.0 ≤ 𝑥 < 2.29.24	CNA
coder	coder	2.35.0 ≤ 𝑥 < 2.36.0	CNA

Common Weakness Enumeration

CWE-400 - Uncontrolled Resource Consumption
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References

https://github.com/coder/coder/security/advisories/GHSA-64xh-rgcx-gg65

https://www.vulncheck.com/advisories/coder-from-2.38.0-before-2.38.4-memory-exhaustion-dos-via-web-push