CVE-2026-58228Public exploitNetwork attack vector

Cross-site scripting via leading URL control bytes

Published Jul 13, 2026 · Updated Jul 13, 2026

Cross-site scripting in Phoenix LiveView 1.2.2 through 1.2.6 allows remote attackers to execute JavaScript through crafted links. The uri_scheme/1 helper treats URLs beginning with control or space bytes as relative paths, while browsers strip those bytes and parse the hidden javascript scheme. Exploitation requires an application to render an attacker-controlled URL through the Phoenix link component and a victim to click it, exposing session-accessible data and actions.

CVSS severity5.1
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Phoenix LiveView 1.2.2 through 1.2.6 allows remote attackers to execute JavaScript through crafted links. The uri_scheme/1 helper treats URLs beginning with control or space bytes as relative paths, while browsers strip those bytes and parse the hidden javascript scheme. Exploitation requires an application to render an attacker-controlled URL through the Phoenix link component and a victim to click it, exposing session-accessible data and actions.

The record

CVE
CVE-2026-58228
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
Phoenix Framework
Product
Phoenix LiveView
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.2.2 <1.2.7
  2. Affected versionversion=4b63216ae68886db99cf7772af23372d76c40e7e <86165533e311469a1b62093fd182d9d874de8106

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Phoenix Framework · Phoenix LiveViewversion=1.2.2 <1.2.7; version=4b63216ae68886db99cf7772af23372d76c40e7e <86165533e311469a1b62093fd182d9d874de8106

Published CVSS scores

5.1GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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