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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"cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Phoenix.LiveView.Utils\u0027"
],
"packageName": "phoenix_live_view",
"packageURL": "pkg:hex/phoenix_live_view",
"product": "phoenix_live_view",
"programFiles": [
"lib/phoenix_live_view/utils.ex"
],
"programRoutines": [
{
"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": "1.2.7",
"status": "affected",
"version": "1.2.2",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Phoenix.LiveView.Utils\u0027"
],
"packageName": "phoenixframework/phoenix_live_view",
"packageURL": "pkg:github/phoenixframework/phoenix_live_view",
"product": "phoenix_live_view",
"programFiles": [
"lib/phoenix_live_view/utils.ex"
],
"programRoutines": [
{
"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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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.