CVE-2026-23940
Uncontrolled Resource Consumption vulnerability in hexpm hexpm/hexpm allows Excessive Allocation.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 hex.pm: before 2026-03-10.
- CVSS 4.0
- 7.1 HIGHCVSS: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/M
- EPSS
- 0.44% probability · 37th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- hex/hexpm
- Source
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
References
- https://cna.erlef.org/cves/CVE-2026-23940.html
- https://github.com/hexpm/hexpm/commit/495f01607d3eae4aed7ad09b2f54f31ec7a7df01Patch
- https://github.com/hexpm/hexpm/commit/82911daf5f8fb2ab44f298e3ba22b90bc1ae3746
- https://github.com/hexpm/hexpm/security/advisories/GHSA-jp8w-gxf6-8hcrMitigation, Vendor Advisory
- https://osv.dev/vulnerability/EEF-CVE-2026-23940
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.