FKIE_CVE-2026-55877

Vulnerability from fkie_nvd - Published: 2026-07-08 22:17 - Updated: 2026-07-10 19:13
Severity
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
Symfony UX is a JavaScript ecosystem for Symfony. From 2.17.0 before 2.36.1 and from 3.0.0 before 3.2.0, the ux_icon() Twig function is marked is_safe=['html'] and Icon::toHtml() inlines SVG source verbatim, allowing unsanitized local SVG files or Iconify on-demand JSON body responses containing nested script elements, on* event handlers, or dangerous URL schemes to execute cross-site scripting. This issue is fixed in versions 2.36.1 and 3.2.0.
References
security-advisories@github.comhttps://github.com/symfony/ux/commit/3a4964ec3700f0af4e13f7bfbf8bb3174c3e79d1
security-advisories@github.comhttps://github.com/symfony/ux/releases/tag/v2.36.1
security-advisories@github.comhttps://github.com/symfony/ux/releases/tag/v3.2.0
security-advisories@github.comhttps://github.com/symfony/ux/security/advisories/GHSA-6v8j-33hc-mv84
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "ux",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.17.0, \u003c 2.36.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 3.2.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Symfony UX is a JavaScript ecosystem for Symfony. From 2.17.0 before 2.36.1 and from 3.0.0 before 3.2.0, the ux_icon() Twig function is marked is_safe=[\u0027html\u0027] and Icon::toHtml() inlines SVG source verbatim, allowing unsanitized local SVG files or Iconify on-demand JSON body responses containing nested script elements, on* event handlers, or dangerous URL schemes to execute cross-site scripting. This issue is fixed in versions 2.36.1 and 3.2.0."
    }
  ],
  "id": "CVE-2026-55877",
  "lastModified": "2026-07-10T19:13:03.283",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-55877",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-09T14:21:00.657899Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-08T22:17:15.920",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/symfony/ux/commit/3a4964ec3700f0af4e13f7bfbf8bb3174c3e79d1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/symfony/ux/releases/tag/v2.36.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/symfony/ux/releases/tag/v3.2.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/symfony/ux/security/advisories/GHSA-6v8j-33hc-mv84"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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