{"answers":{"affected":"4 open source packages ship an affected version, including craftcms/cms.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56383 exists.","fix":"Upgrade craftcms/cms to a fixed version for your release line: 4.16.19 or 5.8.23.","what":"CVE-2026-56383 is a medium-severity cross-site scripting vulnerability in craftcms cms, published on 21 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-56383 and fix it if it is affected.\n\nWhat it is: CVE-2026-56383 is a medium-severity cross-site scripting vulnerability in craftcms cms, published on 21 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56383 exists.\n\nAffected packages and fixed versions:\n- craftcms/cms (Packagist): affected from 4.5.0-beta.1; fixed in 4.16.19\n- craftcms/cms (Packagist): affected from 4.5.0-beta.1; fixed in 4.16.19\n- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.8.23\n- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.8.23\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-2026-56383/ (Markdown: https://insights.sbomify.com/CVE-2026-56383/index.md)","id":"CVE-2026-56383","markdown":"https://insights.sbomify.com/CVE-2026-56383/index.md","name":"CVE-2026-56383","record":{"aliases":["GHSA-6j87-m5qx-9fqp"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"Craft CMS","requires_auth":"high_privilege","summary":"An administrator can inject JavaScript into Craft CMS table fields, leading to script execution for other users viewing the page.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":4.6,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Craft CMS contains a stored cross-site scripting (XSS) vulnerability in the editableTable.twig component when using the 'Row Heading' column type. The application fails to sanitize input within row heading default values, allowing an attacker with an administrator account (with allowAdminChanges enabled) to inject arbitrary JavaScript that executes when another user views a page containing the affected table field. Affected versions are \u003e= 4.5.0-beta.1 through 4.16.18 and \u003e= 5.0.0-RC1 through 5.8.22; fixed in 4.16.19 and 5.8.23.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Craft CMS - Stored XSS in Table Field via Row Heading Column Type","id":"CVE-2026-56383","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Craft CMS - Missing Authorization in assets/preview-thumb Endpoint","id":"CVE-2026-56384"},"packages":[{"ecosystem":"Packagist","fixed":["4.16.19"],"introduced":["4.5.0-beta.1"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-6j87-m5qx-9fqp"},{"ecosystem":"Packagist","fixed":["4.16.19"],"introduced":["4.5.0-beta.1"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-6j87-m5qx-9fqp"},{"ecosystem":"Packagist","fixed":["5.8.23"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-6j87-m5qx-9fqp"},{"ecosystem":"Packagist","fixed":["5.8.23"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-6j87-m5qx-9fqp"}],"prev":{"headline":"Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController","id":"CVE-2026-56382"},"products":["cms"],"published":"2026-06-21","related":[],"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-23","vendors":["craftcms"]},"summary":"An administrator can inject JavaScript into Craft CMS table fields, leading to script execution for other users viewing the page.","url":"https://insights.sbomify.com/CVE-2026-56383/"}