Vulnerability record · CVE-2026-21618 · published 19 January 2026

CVE-2026-21618: Hexpm cross-site scripting vulnerability

Hex · Hexpm

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in hexpm hexpm/hexpm ('Elixir.HexpmWeb.SharedAuthorizationView' modules) allows Cross-Site Scripting (XSS). This vulnerability is associated with program files lib/hexpm_web/views/shared_authorization_view.ex and program routines 'Elixir.HexpmWeb.SharedAuthorizationView':render_grouped_scopes/3. This issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before c692438684ead90c3bcbfb9ccf4e63c768c668a8; hex.pm: from 2025-10-01 before 2026-01-19.

8.5 CVSS 4.0 High EPSS 0.26% · top 84.6% CWE-79 · Cross-site scripting

8.5CVSS 4.0 base score

0.26%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References

24 Jul 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Hexpm Hex

References

Link	Tags
https://cna.erlef.org/cves/CVE-2026-21618.html
https://github.com/hexpm/hexpm/commit/c692438684ead90c3bcbfb9ccf4e63c768c668a8	Patch
https://github.com/hexpm/hexpm/security/advisories/GHSA-6cw9-5gg4-rhpj	MitigationVendor Advisory
https://osv.dev/vulnerability/EEF-CVE-2026-21618

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-21618), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.