CVE-2026-23940

Denial of Service via Oversized Package Upload

State: Published
Severity: 7.1 High
Published: Mar 13, 2026
Updated: Sep 8, 2026
Reserved: Jan 19, 2026

Description

Uncontrolled Resource Consumption vulnerability in hexpm hexpm/hexpm allows Excessive Allocation.

Publishing an oversized package can cause Hex.pm to run out of memory while extracting the uploaded package tarball. This can terminate the affected application instance and result in a denial of service for package publishing and potentially other package-processing functionality.

This issue affects hex.pm: before 2026-03-10.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	EEF

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
hexpmhexpm	before 2026-03-10Affected
hexpmhexpm	82911daf5f8fb2ab44f298e3ba22b90bc1ae3746 to before 495f01607d3eae4aed7ad09b2f54f31ec7a7df01Affected

References

https://github.com/hexpm/hexpm/security/advisories/GHSA-jp8w-gxf6-8hcrvendor-advisoryrelated
EEF CNA record for CVE-2026-23940related
OSV record EEF-CVE-2026-23940related
Introducing commit 82911da in hexpm/hexpmrelated
Fix commit 495f016 in hexpm/hexpmpatch

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