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

Quick assessment

Affected
hexpm hexpm
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hexpm是Hex开源的一个Web页面和接口。 Hexpm存在安全漏洞，该漏洞源于输入中和不当，可能导致跨站脚本攻击。

CVSS 8.5 · High EPSS 0.26% · P16

Affected Version Matrix 2

VendorProduct Version RangeStatus
hexpm hex.pm 2025-10-01< 2026-01-19 affected
hexpm hexpm 617e44c71f1dd9043870205f371d375c5c4d886d< c692438684ead90c3bcbfb9ccf4e63c768c668a8 affected
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I. Basic Information for CVE-2026-21618

Vulnerability Information
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Vulnerability Title
Cross-site scripting (XSS) in OAuth Device Authorization screen
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Hexpm 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hexpm是Hex开源的一个Web页面和接口。 Hexpm存在安全漏洞，该漏洞源于输入中和不当，可能导致跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hexpm hexpm 617e44c71f1dd9043870205f371d375c5c4d886d ~ c692438684ead90c3bcbfb9ccf4e63c768c668a8 cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*
hexpm hex.pm 2025-10-01 ~ 2026-01-19 -

II. Public POCs for CVE-2026-21618

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10239 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-21618

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Vendor Advisories for CVE-2026-21618 (3)

IV. Related Vulnerabilities

Same product: hexpm
Same vendor: hexpm
Same weakness: CWE-79

V. Comments for CVE-2026-21618

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