{"answers":{"affected":"4 open source packages ship an affected version, including symfony/ux-icons. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-55877 in the wild and no public exploit code.","fix":"Upgrade symfony/ux-icons to a fixed version for your release line: 2.36.1 or 3.2.0.","what":"CVE-2026-55877 is a medium-severity cross-site scripting vulnerability in symfony ux, published on 8 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-55877 and fix it if it is affected.\n\nWhat it is: CVE-2026-55877 is a medium-severity cross-site scripting vulnerability in symfony ux, published on 8 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-55877 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- symfony/ux-icons (Packagist): affected from 2.17.0; fixed in 2.36.1\n- symfony/ux-icons (Packagist): affected from 2.17.0; fixed in 2.36.1\n- symfony/ux-icons (Packagist): affected from 3.0.0; fixed in 3.2.0\n- symfony/ux-icons (Packagist): affected from 3.0.0; fixed in 3.2.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-55877/ (Markdown: https://insights.sbomify.com/CVE-2026-55877/index.md)","id":"CVE-2026-55877","markdown":"https://insights.sbomify.com/CVE-2026-55877/index.md","name":"CVE-2026-55877","record":{"aliases":["GHSA-6v8j-33hc-mv84"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Symfony UX Icons","requires_auth":"none","summary":"Attackers can execute cross-site scripting via unsanitized SVG content in Symfony UX Icons, requiring an upgrade to patched versions.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"ux","vendor":"symfony"}],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"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.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Symfony UX: XSS in symfony/ux-icons via unsanitized SVG content in local files and Iconify on-demand responses","id":"CVE-2026-55877","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":4,"n_references":4,"next":{"headline":"Symfony: Path Traversal in symfony/ux-toolkit Allows Arbitrary File Write and Read via Crafted Recipe Manifest","id":"CVE-2026-55878"},"packages":[{"ecosystem":"Packagist","fixed":["2.36.1"],"introduced":["2.17.0"],"last_affected":[],"package":"symfony/ux-icons","purl":null,"source":"GHSA-6v8j-33hc-mv84"},{"ecosystem":"Packagist","fixed":["2.36.1"],"introduced":["2.17.0"],"last_affected":[],"package":"symfony/ux-icons","purl":"pkg:composer/symfony/ux-icons","source":"GHSA-6v8j-33hc-mv84"},{"ecosystem":"Packagist","fixed":["3.2.0"],"introduced":["3.0.0"],"last_affected":[],"package":"symfony/ux-icons","purl":null,"source":"GHSA-6v8j-33hc-mv84"},{"ecosystem":"Packagist","fixed":["3.2.0"],"introduced":["3.0.0"],"last_affected":[],"package":"symfony/ux-icons","purl":"pkg:composer/symfony/ux-icons","source":"GHSA-6v8j-33hc-mv84"}],"prev":{"headline":"Helium: Stored XSS via Unrestricted SVG File Upload — Authenticated Users Can Store Executable Scripts","id":"CVE-2026-55876"},"products":["ux"],"published":"2026-07-08","related":[{"cvss_score":6.9,"headline":"Symfony UX: Format-less date LiveProps parsed with the permissive DateTime constructor","id":"CVE-2026-49208","kev_date_added":null,"published":"2026-07-17"},{"cvss_score":6.9,"headline":"Symfony UX: Information exposure via unescaped LIKE wildcards in EntitySearchUtil","id":"CVE-2026-49211","kev_date_added":null,"published":"2026-07-17"},{"cvss_score":6.9,"headline":"Symfony UX: LiveComponentHydrator HMAC checksum lacks component and slot binding","id":"CVE-2026-49212","kev_date_added":null,"published":"2026-07-17"},{"cvss_score":5.3,"headline":"Symfony UX: Denial of service in symfony/ux-live-component via unbounded batch action requests","id":"CVE-2026-49209","kev_date_added":null,"published":"2026-07-17"},{"cvss_score":5.1,"headline":"Symfony UX: XSS in symfony/ux-autocomplete via unescaped AJAX response data","id":"CVE-2026-49216","kev_date_added":null,"published":"2026-07-17"},{"cvss_score":2.3,"headline":"Symfony UX: XSS in symfony/ux-live-component via attacker-controlled child component tag","id":"CVE-2026-49210","kev_date_added":null,"published":"2026-07-17"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-09","vendors":["symfony"]},"summary":"Attackers can execute cross-site scripting via unsanitized SVG content in Symfony UX Icons, requiring an upgrade to patched versions.","url":"https://insights.sbomify.com/CVE-2026-55877/"}