What’s Vulnerable › Vulnerabilities

CVE-2026-21618: Cross-site scripting (XSS) in OAuth Device Authorization screen

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-19 · updated 2026-07-24
• Weakness: CWE-79

Description

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.

Affected products

• hexpm: from 2025-10-01 before 2026-01-19 — fixed in 2026-01-19

How to fix

Upgrade to a fixed version: hexpm 2026-01-19. Check the vendor advisory for mitigations.

References

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

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