How serious is CVE-2026-23940?

This vulnerability has a CVSS score of 7.1 out of 10, classified as HIGH severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-23940?

Yes, proof-of-concept exploit code for CVE-2026-23940 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-23940?

Check the official CVE details for a complete list of affected products and versions.

How do I fix CVE-2026-23940?

To remediate CVE-2026-23940, check for security patches from the vendor. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-23940

High

|7.1

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

An attacker can cause the Hex.pm package management system to crash by uploading an excessively large package, which can lead to a denial of service for anyone trying to publish or process packages. This vulnerability affects specific versions of Hex.pm before March 2026, meaning users need to be running an outdated version to be at risk.

Technical 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 Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$1,211($1K-$5K)

Vendor Response

Grade APatched in 2 days

Quick Information

Published

Mar 13, 2026

25 days ago

Last Modified

Mar 16, 2026

22 days ago