CVE-2026-58228 (GCVE-0-2026-58228)

Vulnerability from cvelistv5 – Published: 2026-07-13 18:04 – Updated: 2026-07-14 04:15
VLAI
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
5.1 (Medium)
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
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
EEF
References
Impacted products
Vendor Product Version
phoenixframework phoenix_live_view Affected: 1.2.2 , < 1.2.7 (semver)
    cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*
 Create a notification for this product.
phoenixframework phoenix_live_view Affected: 4b63216ae68886db99cf7772af23372d76c40e7e , < 86165533e311469a1b62093fd182d9d874de8106 (git)
    cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Barna Kovacs Steffen Deusch José Valim Jonatan Männchen / EEF
Show details on NVD website
To clipboard 

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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-58228\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-13T18:58:11.563760Z\"}}}], \"references\": [{\"url\": \"https://github.com/phoenixframework/phoenix_live_view/security/advisories/GHSA-5cgh-g58j-m9cq\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-13T18:58:43.613Z\"}}], \"cna\": {\"title\": \"Scheme validation bypass in Phoenix.LiveView.Utils leads to XSS via \u003c.link\u003e\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"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\"}], \"impacts\": [{\"capecId\": \"CAPEC-63\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-63 Cross-Site Scripting (XSS)\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 5.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"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\", \"userInteraction\": \"ACTIVE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"HIGH\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"LOW\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/phoenixframework/phoenix_live_view\", \"vendor\": \"phoenixframework\", \"modules\": [\"\u0027Elixir.Phoenix.LiveView.Utils\u0027\"], \"product\": \"phoenix_live_view\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.2.2\", \"lessThan\": \"1.2.7\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:hex/phoenix_live_view\", \"packageName\": \"phoenix_live_view\", \"programFiles\": [\"lib/phoenix_live_view/utils.ex\"], \"collectionURL\": \"https://repo.hex.pm\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.Phoenix.LiveView.Utils\u0027:valid_destination!/2\"}, {\"name\": \"\u0027Elixir.Phoenix.LiveView.Utils\u0027:valid_live_navigation_destination!/2\"}]}, {\"cpes\": [\"cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/phoenixframework/phoenix_live_view\", \"vendor\": \"phoenixframework\", \"modules\": [\"\u0027Elixir.Phoenix.LiveView.Utils\u0027\"], \"product\": \"phoenix_live_view\", \"versions\": [{\"status\": \"affected\", \"version\": \"4b63216ae68886db99cf7772af23372d76c40e7e\", \"lessThan\": \"86165533e311469a1b62093fd182d9d874de8106\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/phoenixframework/phoenix_live_view\", \"packageName\": \"phoenixframework/phoenix_live_view\", \"programFiles\": [\"lib/phoenix_live_view/utils.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.Phoenix.LiveView.Utils\u0027:valid_destination!/2\"}, {\"name\": \"\u0027Elixir.Phoenix.LiveView.Utils\u0027:valid_live_navigation_destination!/2\"}]}], \"references\": [{\"url\": \"https://github.com/phoenixframework/phoenix_live_view/security/advisories/GHSA-5cgh-g58j-m9cq\", \"tags\": [\"vendor-advisory\", \"related\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-58228.html\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-58228\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/phoenixframework/phoenix_live_view/commit/86165533e311469a1b62093fd182d9d874de8106\", \"tags\": [\"patch\"]}], \"workarounds\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"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\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"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. 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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.\", \"supportingMedia\": [{\"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\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"1.2.7\", \"versionStartIncluding\": \"1.2.2\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-07-13T18:04:30.636Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-58228\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-13T18:58:51.407Z\", \"dateReserved\": \"2026-06-29T18:54:08.633Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-07-13T18:04:30.636Z\", \"assignerShortName\": \"EEF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.