High 7.1Published Mar 13, 2026

CVE-2026-23940Denial of Service via Oversized Package Upload

Updated under an hour ago (Oct 26, 2026, 4:23 AM ET)

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It affects hexpm and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for hexpm

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: EEF
NVD analysis: Modified
Record last updated: Sep 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

hexpm hexpm hexpm:hexpm	before 2026-03-10	CNA record
hex hexpm hex:hexpm	before 2026-03-09	NVD

References

https://github.com/hexpm/hexpm/security/advisories/GHSA-jp8w-gxf6-8hcrvendor-advisory, related, mitigation
https://cna.erlef.org/cves/CVE-2026-23940.htmlrelated
https://osv.dev/vulnerability/EEF-CVE-2026-23940related
https://github.com/hexpm/hexpm/commit/82911daf5f8fb2ab44f298e3ba22b90bc1ae3746related
https://github.com/hexpm/hexpm/commit/495f01607d3eae4aed7ad09b2f54f31ec7a7df01patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.