CVE-2026-103503: hexpm hex

Hex trusts its bundled CA certificates when cacerts_path is set

CVSS 5.9 MediumEPSS 0.0021 · 10th percentile

Published by the CVE Program (CNA: EEF) at 12 Oct 2026, 15:17 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 0.20.2 to before 2.5.2 semver Other versions: unaffected
hexpm	hex Package name: hexpm/hex https://github.com pkg:github/hexpm/hex	affected c9b26a46928bfcd546773571e09c1d05f4cd9fb7 to before * git Other versions: unaffected

Identifiers

CVE-2026-103503

CNA

EEF

Weakness (CWE)

CWE-295

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
5.9	Medium	4.0	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0021, the 10th 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-rw8q-hg7m-cxgr relatedvendor-advisory
cna.erlef.org/cves/CVE-2026-103503.html related
osv.dev/vulnerability/EEF-CVE-2026-103503 related
github.com/hexpm/hex/commit/c9b26a46928bfcd546773571e09c1d05f4cd9fb7 related
github.com/hexpm/hex/commit/5f5a2136c7cf5991b6e8a30d645ca9f8e74b0785 patch
github.com/hexpm/hex/commit/6232a6498015e559743bec4f4fbec9138837cec8 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.