{"answers":{"affected":"2 open source packages ship an affected version, including getgrav/grav.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55890 exists.","fix":"Upgrade getgrav/grav to 2.0.0-rc.9 or later.","what":"CVE-2026-55890 is a medium-severity cross-site scripting vulnerability in getgrav grav, published on 10 Jul 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-2026-55890 and fix it if it is affected.\n\nWhat it is: CVE-2026-55890 is a medium-severity cross-site scripting vulnerability in getgrav grav, published on 10 Jul 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-2026-55890 exists.\n\nAffected packages and fixed versions:\n- getgrav/grav (Packagist): affected all versions; fixed in 2.0.0-rc.9\n- getgrav/grav (Packagist): affected all versions; fixed in 2.0.0-rc.9\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-2026-55890/ (Markdown: https://insights.sbomify.com/CVE-2026-55890/index.md)","id":"CVE-2026-55890","markdown":"https://insights.sbomify.com/CVE-2026-55890/index.md","name":"CVE-2026-55890","record":{"aliases":["GHSA-pmf8-g7c8-7v54"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Grav CMS","requires_auth":"high_privilege","summary":"Attackers can inject malicious CSS via Markdown image styles in Grav, potentially leading to script execution or session hijacking.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/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":"Grav is a file-based Web platform. Prior to 2.0.0-rc.9, Grav's incomplete fix for stored XSS through the Markdown media attribute action (CVE-2026-42841) leaves the sibling MediaObjectTrait::style method reachable through the same Markdown excerpt-action pipeline, allowing an editor to save Markdown image style parameters that are written into the rendered img style attribute without sanitization. This issue is fixed in version 2.0.0-rc.9.","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":"Grav: Stored CSS injection via Markdown image ?style=… reaches MediaObjectTrait::style()","id":"CVE-2026-55890","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"PrivateBin: Reflected JSON injection in backend responses via unescaped REQUEST_URI","id":"CVE-2026-55891"},"packages":[{"ecosystem":"Packagist","fixed":["2.0.0-rc.9"],"introduced":["0"],"last_affected":[],"package":"getgrav/grav","purl":null,"source":"GHSA-pmf8-g7c8-7v54"},{"ecosystem":"Packagist","fixed":["2.0.0-rc.9"],"introduced":["0"],"last_affected":[],"package":"getgrav/grav","purl":"pkg:composer/getgrav/grav","source":"GHSA-pmf8-g7c8-7v54"}],"prev":{"headline":"XDG Desktop Portal: Drag-and-drop and copy-paste theft via predictable FileTransfer key","id":"CVE-2026-55889"},"products":["grav"],"published":"2026-07-10","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":"2026-07-10","vendors":["getgrav"]},"summary":"Attackers can inject malicious CSS via Markdown image styles in Grav, potentially leading to script execution or session hijacking.","url":"https://insights.sbomify.com/CVE-2026-55890/"}