CVE-2026-23940highCWE-400

Denial of Service via Oversized Package Upload

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.1epss 0.4%

exploitation probability

0.4%top 65% of all CVEs

observed exploitation

nono source reports it

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products

hexpm · hexpm

References

https://cna.erlef.org/cves/CVE-2026-23940.html https://github.com/hexpm/hexpm/commit/495f01607d3eae4aed7ad09b2f54f31ec7a7df01 https://github.com/hexpm/hexpm/commit/82911daf5f8fb2ab44f298e3ba22b90bc1ae3746 https://github.com/hexpm/hexpm/security/advisories/GHSA-jp8w-gxf6-8hcr https://osv.dev/vulnerability/EEF-CVE-2026-23940