CVE-2026-58228 Details
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.
A cross-site scripting (XSS) vulnerability has been identified in the Phoenix Live View component of the Phoenix Framework, specifically in versions 1.2.2 prior to 1.2.7. This vulnerability allows attackers to bypass URL scheme validation and execute JavaScript in the context of the victim's browser session. The issue arises in the 'Phoenix.LiveView.Utils.valid_destination!/2' and 'valid_live_navigation_destination!/2' functions, which rely on a helper that only recognizes schemes when the first byte is an ASCII letter. Inputs starting with an ASCII control character or space are incorrectly treated as safe relative paths. Standard browsers, following the WHATWG URL parsing rules, remove leading control and space characters before processing URLs. Consequently, a link such as ' javascript:alert(1)' is interpreted by the browser as a 'javascript:' URL, executing the injected script in the user's session. This vulnerability affects applications that use '<.link href={...}>' to render user-supplied URLs, such as profile links or redirect targets.
Users can upgrade to Phoenix Live View version 1.2.7, where this vulnerability has been patched. Alternatively, untrusted URLs can be sanitized by removing leading ASCII control and space characters before passing them to '<.link href={...}>'.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 13, 2026CISA-ADP
Assessed Jul 13, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/phoenixframework/phoenix_live_view/security/advisories/GHSA-5cgh-g58j-m9cq | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://cna.erlef.org/cves/CVE-2026-58228.html | EEF | AdvisoryBundle |
| https://github.com/phoenixframework/phoenix_live_view/commit/86165533e311469a1b62093fd182d9d874de8106 | EEF | Source CodeVendor |
| https://github.com/phoenixframework/phoenix_live_view/security/advisories/GHSA-5cgh-g58j-m9cq | EEF | AdvisoryExploitRemedyVendor |
| https://osv.dev/vulnerability/EEF-CVE-2026-58228 | EEF | AdvisoryBundle |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | EEF |
Affected Products
| Product | Versions |
|---|---|
| Phoenix.LiveView | >= 1.2.2, < 1.2.7 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 13, 2026 | CVE Modified | CISA-ADP |
| Jul 13, 2026 | New CVE Received | EEF |