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CVE-2026-58228— Scheme validation bypass in Phoenix.LiveView.Utils leads to XSS via <.link>

Quick assessment

Affected
phoenixframework phoenix_live_view
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

phoenixframework phoenix是phoenixframework团队开源的一款Web开发框架。 phoenixframework phoenix 1.2.2版本至1.2.7之前版本存在跨站脚本漏洞，该漏洞源于URL scheme验证绕过，可能导致跨站脚本攻击。

AI Predicted 6.1 Difficulty: Easy EPSS 0.57% · P46

Affected Version Matrix 2

VendorProduct Version RangeStatus
phoenixframework phoenix_live_view 1.2.2< 1.2.7 affected
4b63216ae68886db99cf7772af23372d76c40e7e< 86165533e311469a1b62093fd182d9d874de8106 affected
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I. Basic Information for CVE-2026-58228

Vulnerability Information
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Vulnerability Title
Scheme validation bypass in Phoenix.LiveView.Utils leads to XSS via <.link>
Source: CVE Program / CVE List V5
Vulnerability Description
Cross-site scripting vulnerability in phoenixframework phoenix_live_view allows an attacker to bypass URL scheme validation and execute JavaScript in a victim's browser session. The Phoenix.LiveView.Utils.valid_destination!/2 and Phoenix.LiveView.Utils.valid_live_navigation_destination!/2 functions in lib/phoenix_live_view/utils.ex rely on an internal uri_scheme/1 helper that only detects a scheme when the input's first byte is an ASCII letter. Inputs beginning with an ASCII control character or space fall through to a nil-returning clause, causing the URL to be treated as a safe relative path. Standard browsers implement the WHATWG URL parser, which strips leading C0 control and space characters before parsing. As a result, an input such as " javascript:alert(1)" is passed unchanged into <.link href={...}> and, when clicked, is parsed by the browser as a javascript: URL that executes attacker-controlled script in the victim's session. Applications that render user-supplied URLs (for example profile links, redirect targets, or external references) via <.link href={...}> are affected. This issue affects phoenix_live_view: from 1.2.2 before 1.2.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/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
phoenixframework phoenix 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
phoenixframework phoenix是phoenixframework团队开源的一款Web开发框架。 phoenixframework phoenix 1.2.2版本至1.2.7之前版本存在跨站脚本漏洞，该漏洞源于URL scheme验证绕过，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
phoenixframework phoenix_live_view 1.2.2 ~ 1.2.7 cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*
phoenixframework phoenix_live_view 4b63216ae68886db99cf7772af23372d76c40e7e ~ 86165533e311469a1b62093fd182d9d874de8106 cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-58228

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III. Intelligence Information for CVE-2026-58228

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Patches & Fixes for CVE-2026-58228 (1)

Vendor Advisories for CVE-2026-58228 (3)

IV. Related Vulnerabilities

Same product: phoenix_live_view
Same vendor: phoenixframework
Same weakness: CWE-79

V. Comments for CVE-2026-58228

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