8.5

CVE-2026-21618: hex hexpm Cross-site Scripting

CVSS: 8.5v4.0HighModified
Published 19-01-2026Last modified 24-07-2026
Open JSON

Vulnerability summary

CVE-2026-21618 is a high (CVSS 8.5) Cross-site Scripting vulnerability in hex hexpm. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16.6% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.5/10
010
High · v4.0 (CVE.org)
EPSS score
0.26%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 19-01-2026
    PublishedVulnerability first disclosed.
  2. 24-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

+0.01 pp

From 0.26% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.26%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Hex1 product
  • hexpm≥ 2025-10-01, < 2026-01-19
Hexpm1 product
  • hexpm≥ 617e44c71f1dd9043870205f371d375c5c4d886d, < c692438684ead90c3bcbfb9ccf4e63c768c668a8 | ≥ 2025-10-01, < 2026-01-19

2 vendors · 2 products

References

4 links