{"id":"CVE-2026-55877","state":"PUBLISHED","title":"Symfony UX: XSS in symfony/ux-icons via unsanitized SVG content in local files and Iconify on-demand responses","description":"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.","publishedAt":"2026-07-08T21:32:37.407Z","updatedAt":"2026-07-09T14:40:25.026Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["symfony ux"],"affected":[{"vendor":"symfony","product":"ux","versions":[{"version":">= 2.17.0, < 2.36.1","status":"affected"},{"version":">= 3.0.0, < 3.2.0","status":"affected"}]}],"references":["https://github.com/symfony/ux/security/advisories/GHSA-6v8j-33hc-mv84","https://github.com/symfony/ux/commit/3a4964ec3700f0af4e13f7bfbf8bb3174c3e79d1","https://github.com/symfony/ux/releases/tag/v2.36.1","https://github.com/symfony/ux/releases/tag/v3.2.0"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55877.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55877","state":"PUBLISHED","datePublished":"2026-07-08T21:32:37.407Z","dateUpdated":"2026-07-09T14:40:25.026Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-17T16:59:42.759Z"},"containers":{"cna":{"title":"Symfony UX: XSS in symfony/ux-icons via unsanitized SVG content in local files and Iconify on-demand responses","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=['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."}],"affected":[{"vendor":"symfony","product":"ux","versions":[{"version":">= 2.17.0, < 2.36.1","status":"affected"},{"version":">= 3.0.0, < 3.2.0","status":"affected"}]}],"references":[{"url":"https://github.com/symfony/ux/security/advisories/GHSA-6v8j-33hc-mv84","name":"https://github.com/symfony/ux/security/advisories/GHSA-6v8j-33hc-mv84","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/symfony/ux/commit/3a4964ec3700f0af4e13f7bfbf8bb3174c3e79d1","name":"https://github.com/symfony/ux/commit/3a4964ec3700f0af4e13f7bfbf8bb3174c3e79d1","tags":["x_refsource_MISC"]},{"url":"https://github.com/symfony/ux/releases/tag/v2.36.1","name":"https://github.com/symfony/ux/releases/tag/v2.36.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/symfony/ux/releases/tag/v3.2.0","name":"https://github.com/symfony/ux/releases/tag/v3.2.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-08T21:32:37.407Z"},"source":{"advisory":"GHSA-6v8j-33hc-mv84","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T14:21:00.657899Z","id":"CVE-2026-55877","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-09T14:40:25.026Z"}}]}}}