CVE-2026-96618: hexpm hex

Hex exhausts memory and disk on oversized or compressed responses from an untrusted mirror

CVSS 2.1 LowEPSS 0.0036 · 29th percentile

Published by the CVE Program (CNA: EEF) at 12 Oct 2026, 15:29 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
hexpm	hex Package name: hex pkg:otp/hex?repository_url=https:%2F%2Fgithub.com%2Fhexpm%2Fhex&vcs_url=repository_url=git%2Bhttps:%2F%2Fgithub.com%2Fhexpm%2Fhex.git	affected 0.11.2 to before 2.5.2 semver Other versions: unaffected
hexpm	hex Package name: hexpm/hex https://github.com pkg:github/hexpm/hex	affected 51ea632424fb6ea8765148f96dc25dfeb526b1f8 to before * git Other versions: unaffected

Identifiers

CVE-2026-96618

CNA

EEF

Weakness (CWE)

CWE-409 · CWE-770

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
2.1	Low	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0036, the 29th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 12 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/hexpm/hex/security/advisories/GHSA-gf42-pg2f-63jp relatedvendor-advisory
cna.erlef.org/cves/CVE-2026-96618.html related
osv.dev/vulnerability/EEF-CVE-2026-96618 related
github.com/hexpm/hex/commit/51ea632424fb6ea8765148f96dc25dfeb526b1f8 related
github.com/hexpm/hex/commit/bb5189eade682c5fc3f98d9725973a7beb4e1deb patch
github.com/hexpm/hex/commit/08956100a8283ba500a123e5539ac64d5d7e91d8 patch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.