{"answers":{"affected":"12 open source packages ship an affected version, including symfony/html-sanitizer and symfony/symfony. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-48761 in the wild and no public exploit code.","fix":"Upgrade symfony/html-sanitizer to a fixed version for your release line: 6.4.41, 7.4.13 or 8.0.13.","what":"CVE-2026-48761 is a medium-severity cross-site scripting vulnerability in Sensiolabs Symfony, published on 14 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-2026-48761 and fix it if it is affected.\n\nWhat it is: CVE-2026-48761 is a medium-severity cross-site scripting vulnerability in Sensiolabs Symfony, published on 14 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-2026-48761 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- symfony/html-sanitizer (Packagist): affected from 6.1.0; fixed in 6.4.41\n- symfony/html-sanitizer (Packagist): affected from 6.1.0; fixed in 6.4.41\n- symfony/html-sanitizer (Packagist): affected from 7.0.0; fixed in 7.4.13\n- symfony/html-sanitizer (Packagist): affected from 7.0.0; fixed in 7.4.13\n- symfony/html-sanitizer (Packagist): affected from 8.0.0; fixed in 8.0.13\n- symfony/html-sanitizer (Packagist): affected from 8.0.0; fixed in 8.0.13\n- symfony/symfony (Packagist): affected from 6.1.0; fixed in 6.4.41\n- symfony/symfony (Packagist): affected from 6.1.0; fixed in 6.4.41\n- symfony/symfony (Packagist): affected from 7.0.0; fixed in 7.4.13\n- symfony/symfony (Packagist): affected from 7.0.0; fixed in 7.4.13\n- symfony/symfony (Packagist): affected from 8.0.0; fixed in 8.0.13\n- symfony/symfony (Packagist): affected from 8.0.0; fixed in 8.0.13\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-2026-48761/ (Markdown: https://insights.sbomify.com/CVE-2026-48761/index.md)","id":"CVE-2026-48761","markdown":"https://insights.sbomify.com/CVE-2026-48761/index.md","name":"CVE-2026-48761","record":{"aliases":["DEBIAN-CVE-2026-48761","GHSA-x5qj-865h-mgvm","UBUNTU-CVE-2026-48761"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Symfony HTML Sanitizer","requires_auth":"none","summary":"Attackers can inject JavaScript payloads via specific HTML tags in Symfony's HTML sanitizer, leading to cross-site scripting if those elements are explicitly enabled.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"symfony","vendor":"sensiolabs"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"},{"id":"CWE-1023","name":"Incomplete Comparison with Missing Factors"}],"description":"Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0 until 6.4.41, 7.4.13, and 8.0.13, UrlAttributeSanitizer::getSupportedAttributes() omitted URL-bearing attributes on \u003cobject\u003e, \u003capplet\u003e, \u003ciframe\u003e, and \u003cimg\u003e, and \u003cmeta http-equiv=\"refresh\"\u003e URLs inside content bypassed URL sanitization, allowing explicitly enabled elements or attributes to pass javascript: and similar payloads into sanitized output. This issue is fixed in versions 6.4.41, 7.4.13, and 8.0.13.","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: HtmlSanitizer UrlAttributeSanitizer Misses URL Attributes","id":"CVE-2026-48761","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"sensiolabs:symfony","products":["sensiolabs:symfony"],"type":"xss","year":"2026"},"n_packages":12,"n_references":5,"next":{"headline":"TypeBot Vulnerable to Server-Side Request Forgery (SSRF) in OpenAI Transcription Handler","id":"CVE-2026-48762"},"packages":[{"ecosystem":"Packagist","fixed":["6.4.41"],"introduced":["6.1.0"],"last_affected":[],"package":"symfony/html-sanitizer","purl":null,"source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["6.4.41"],"introduced":["6.1.0"],"last_affected":[],"package":"symfony/html-sanitizer","purl":"pkg:composer/symfony/html-sanitizer","source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["7.4.13"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/html-sanitizer","purl":null,"source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["7.4.13"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/html-sanitizer","purl":"pkg:composer/symfony/html-sanitizer","source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["8.0.13"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/html-sanitizer","purl":null,"source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["8.0.13"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/html-sanitizer","purl":"pkg:composer/symfony/html-sanitizer","source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["6.4.41"],"introduced":["6.1.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["6.4.41"],"introduced":["6.1.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["7.4.13"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["7.4.13"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["8.0.13"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-x5qj-865h-mgvm"},{"ecosystem":"Packagist","fixed":["8.0.13"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-x5qj-865h-mgvm"}],"prev":{"headline":"Symfony: HtmlSanitizer URL Parser Deny Gates Underinclusive: Percent-Encoded BiDi Marks and Unicode Whitespace Bypass Visual-Spoofing Defense","id":"CVE-2026-48760"},"products":["html-sanitizer","symfony"],"published":"2026-07-14","related":[{"cvss_score":9.8,"headline":"Improper Input Validation in Symfony","id":"CVE-2019-11325","kev_date_added":null,"published":"2019-11-21"},{"cvss_score":9.8,"headline":"Symfony Incorrect Access Control","id":"CVE-2017-11365","kev_date_added":null,"published":"2019-05-23"},{"cvss_score":9.8,"headline":"Invalid HTTP method overrides allow possible XSS or other attacks in Symfony","id":"CVE-2019-10913","kev_date_added":null,"published":"2019-05-16"},{"cvss_score":9.8,"headline":"Symfony Authentication Bypass","id":"CVE-2018-11407","kev_date_added":null,"published":"2018-06-13"},{"cvss_score":9.8,"headline":"Symfony Authentication Bypass","id":"CVE-2016-2403","kev_date_added":null,"published":"2017-02-07"},{"cvss_score":9.1,"headline":"Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator","id":"CVE-2026-45063","kev_date_added":null,"published":"2026-07-14"},{"cvss_score":8.8,"headline":"Symfony: OidcTokenHandler Accepts JWTs Missing aud/iss/exp Claims","id":"CVE-2026-45069","kev_date_added":null,"published":"2026-07-14"}],"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":"2026-07-21","vendors":["symfony"]},"summary":"Attackers can inject JavaScript payloads via specific HTML tags in Symfony's HTML sanitizer, leading to cross-site scripting if those elements are explicitly enabled.","url":"https://insights.sbomify.com/CVE-2026-48761/"}