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CVE-2026-23940

Denial of Service via Oversized Package Upload

Published: Mar 13, 2026Updated: Apr 6, 2026 Sources: CVE List NVDCWE-400
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.4%
Top 65.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 hexpm: before 495f01607d3eae4aed7ad09b2f54f31ec7a7df01; hex.pm: before 2026-03-10.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-400

Affected Products

hexpmhex
Library
OSS Libraries / hex
hexpmhexpm
SaaS
OSS Libraries / generic-library
hex.pmhexpm
SaaS
OSS Libraries / generic-library
hexpackage-ecosystemOSS Libraries
hexpmoss-projectOSS Librariesaka hex, hex.pm, hexpm

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://cna.erlef.org/cves/CVE-2026-23940.html
cna.erlef.org
https://github.com/hexpm/hexpm/commit/495f01607d3eae4aed7ad09b2f54f31ec7a7df01
github.com
https://github.com/hexpm/hexpm/security/advisories/GHSA-jp8w-gxf6-8hcr
github.com
and 1 more references View all →

Timeline

Published
Mar 13, 2026
Last Updated
Apr 6, 2026

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