{"id":"EEF-CVE-2026-23940","summary":"Denial of Service via Oversized Package Upload","details":"## Summary\n\nUncontrolled Resource Consumption vulnerability in hexpm hexpm/hexpm allows Excessive Allocation.\n\nPublishing 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.\n\nThis issue affects hex.pm: before 2026-03-10.\n\n## Workarounds\n\n* Prevent large package uploads by enforcing upload size limits at the reverse proxy or load balancer level.","aliases":["CVE-2026-23940","GHSA-jp8w-gxf6-8hcr"],"modified":"2026-09-08T13:45:02.703372790Z","published":"2026-03-13T16:07:53.328Z","database_specific":{"capec_ids":["CAPEC-130"],"cpe_ids":["cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*"],"cwe_ids":["CWE-400"]},"references":[{"type":"ADVISORY","url":"https://github.com/hexpm/hexpm/security/advisories/GHSA-jp8w-gxf6-8hcr"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-23940.html"},{"type":"WEB","url":"https://github.com/hexpm/hexpm/commit/82911daf5f8fb2ab44f298e3ba22b90bc1ae3746"},{"type":"FIX","url":"https://github.com/hexpm/hexpm/commit/495f01607d3eae4aed7ad09b2f54f31ec7a7df01"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hexpm/hexpm","events":[{"introduced":"82911daf5f8fb2ab44f298e3ba22b90bc1ae3746"},{"fixed":"495f01607d3eae4aed7ad09b2f54f31ec7a7df01"}]}],"database_specific":{"source":"https://cna.erlef.org/osv/EEF-CVE-2026-23940.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}],"credits":[{"name":"Joud Zakharia / zentrust partners GmbH","type":"FINDER"},{"name":"Eric Meadows-Jönsson / Hex.pm","type":"REMEDIATION_DEVELOPER"}]}