CVE-2026-58228 (GCVE-0-2026-58228)
Vulnerability from cvelistv5 – Published: 2026-07-13 18:04 – Updated: 2026-07-14 04:15
VLAI
EPSS
VEX
Title
Scheme validation bypass in Phoenix.LiveView.Utils leads to XSS via <.link>
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-13 18:58 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/phoenixframework/phoenix_live_… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-58228.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-58228 | related |
| https://github.com/phoenixframework/phoenix_live_… | patch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| phoenixframework | phoenix_live_view |
Affected:
1.2.2 , < 1.2.7
(semver)
cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:* |
||
| phoenixframework | phoenix_live_view |
Affected:
4b63216ae68886db99cf7772af23372d76c40e7e , < 86165533e311469a1b62093fd182d9d874de8106
(git)
cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:* |
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{
"name": "\u0027Elixir.Phoenix.LiveView.Utils\u0027:valid_destination!/2"
},
{
"name": "\u0027Elixir.Phoenix.LiveView.Utils\u0027:valid_live_navigation_destination!/2"
}
],
"repo": "https://github.com/phoenixframework/phoenix_live_view",
"vendor": "phoenixframework",
"versions": [
{
"lessThan": "86165533e311469a1b62093fd182d9d874de8106",
"status": "affected",
"version": "4b63216ae68886db99cf7772af23372d76c40e7e",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*",
"versionEndExcluding": "1.2.7",
"versionStartIncluding": "1.2.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Barna Kovacs"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Steffen Deusch"
},
{
"lang": "en",
"type": "analyst",
"value": "Jos\u00e9 Valim"
},
{
"lang": "en",
"type": "analyst",
"value": "Jonatan M\u00e4nnchen / EEF"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eCross-site scripting vulnerability in phoenixframework phoenix_live_view allows an attacker to bypass URL scheme validation and execute JavaScript in a victim\u0027s browser session.\u003c/p\u003e\u003cp\u003eThe \u003ctt\u003ePhoenix.LiveView.Utils.valid_destination!/2\u003c/tt\u003e and \u003ctt\u003ePhoenix.LiveView.Utils.valid_live_navigation_destination!/2\u003c/tt\u003e functions in \u003ctt\u003elib/phoenix_live_view/utils.ex\u003c/tt\u003e rely on an internal \u003ctt\u003euri_scheme/1\u003c/tt\u003e helper that only detects a scheme when the input\u0027s 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.\u003c/p\u003e\u003cp\u003eStandard browsers implement the WHATWG URL parser, which strips leading C0 control and space characters before parsing. As a result, an input such as \u003ctt\u003e\u0026quot; javascript:alert(1)\u0026quot;\u003c/tt\u003e is passed unchanged into \u003ctt\u003e\u0026lt;.link href={...}\u0026gt;\u003c/tt\u003e and, when clicked, is parsed by the browser as a \u003ctt\u003ejavascript:\u003c/tt\u003e URL that executes attacker-controlled script in the victim\u0027s session.\u003c/p\u003e\u003cp\u003eApplications that render user-supplied URLs (for example profile links, redirect targets, or external references) via \u003ctt\u003e\u0026lt;.link href={...}\u0026gt;\u003c/tt\u003e are affected.\u003c/p\u003e\u003cp\u003eThis issue affects phoenix_live_view: from 1.2.2 before 1.2.7.\u003c/p\u003e"
}
],
"value": "Cross-site scripting vulnerability in phoenixframework phoenix_live_view allows an attacker to bypass URL scheme validation and execute JavaScript in a victim\u0027s browser session.\n\nThe 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\u0027s 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.\n\nStandard 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 \u003c.link href={...}\u003e and, when clicked, is parsed by the browser as a javascript: URL that executes attacker-controlled script in the victim\u0027s session.\n\nApplications that render user-supplied URLs (for example profile links, redirect targets, or external references) via \u003c.link href={...}\u003e are affected.\n\nThis issue affects phoenix_live_view: from 1.2.2 before 1.2.7."
}
],
"impacts": [
{
"capecId": "CAPEC-63",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-63 Cross-Site Scripting (XSS)"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "HIGH",
"userInteraction": "ACTIVE",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-13T18:04:30.636Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/phoenixframework/phoenix_live_view/security/advisories/GHSA-5cgh-g58j-m9cq"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-58228.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-58228"
},
{
"tags": [
"patch"
],
"url": "https://github.com/phoenixframework/phoenix_live_view/commit/86165533e311469a1b62093fd182d9d874de8106"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Scheme validation bypass in Phoenix.LiveView.Utils leads to XSS via \u003c.link\u003e",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eStrip leading ASCII control and space bytes (code points 0x00 through 0x20) from any untrusted URL before passing it to \u003ctt\u003e\u0026lt;.link href={...}\u0026gt;\u003c/tt\u003e, or reject such inputs outright. This aligns application-level validation with the WHATWG URL parser used by browsers and prevents the scheme-detection bypass.\u003c/p\u003e"
}
],
"value": "Strip leading ASCII control and space bytes (code points 0x00 through 0x20) from any untrusted URL before passing it to \u003c.link href={...}\u003e, or reject such inputs outright. This aligns application-level validation with the WHATWG URL parser used by browsers and prevents the scheme-detection bypass."
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-58228",
"datePublished": "2026-07-13T18:04:30.636Z",
"dateReserved": "2026-06-29T18:54:08.633Z",
"dateUpdated": "2026-07-13T18:58:51.407Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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