EUVD-2026-55263Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V3 - Web Frontend Security Redirect URL validation
MITRE ATT&CK
1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Aug 10, 2026
Open redirect in Phoenix LiveView's redirect/2 allows an unauthenticated remote attacker to send a victim's browser to an arbitrary external origin by embedding ASCII tab (\t), line feed (\n), or carriage return (\r) in the :to path argument. The private validate_local_url!/2 guard in lib/phoenix_live_view.ex rejects leading double-slashes and backslashes but does not strip or reject these whitespace control characters; browsers silently discard them before URL resolution, so a payload such as /<TAB>/example.com validates as a local path yet resolves to the scheme-relative URL //example.com. Affected versions span three release trains: 0.5.0–1.0.18, 1.1.0-rc.0–1.1.32, and 1.2.0-rc.0–1.2.8. No public exploit code or CISA KEV listing has been identified at time of analysis.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Primary rating from Vendor (EEF) · only source for this CVE.
CVSS VectorVendor: EEF
DescriptionCVE.org
URL Redirection to Untrusted Site ('Open Redirect') vulnerability in phoenixframework phoenix_live_view allows an attacker to send a victim's browser to an origin of the attacker's choosing via a :to value containing ASCII tab, LF or CR.
redirect/2 validates :to through the private validate_local_url!/2 in lib/phoenix_live_view.ex, which is intended to guarantee the target is a path within the application. It rejects a leading // and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as /<TAB>/example.com passes validation as a path and is then resolved as the scheme-relative URL //example.com. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. push_patch/2 is also affected before 0.7.0, which is when that expansion was added.
This issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
GitHub
How this decision was reached
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SSVC AssessmentENISA
Priority Score
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