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CVE-2026-23940

Denial of Service via Oversized Package Upload

Published: Mar 13, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-400
6.5MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 63.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not 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.

No summary for this CVE yet.

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
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Weaknesses

CWE-400

Affected Products

hexpm
oss-projectaka hex.pm, hex
hexpmSaaS
OSS Libraries / generic-library
hex.pmSaaS
OSS Libraries / generic-library
hex
package-ecosystem
hexpmLibrary
OSS Libraries / hex

Exploitability

Official Patch Available
Workaround Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

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

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