{"answers":{"affected":"4 open source packages ship an affected version, including contao/core-bundle.","exploited":"There is no known exploitation of CVE-2026-107848 in the wild and no public exploit code.","fix":"Upgrade contao/core-bundle to a fixed version for your release line: 5.3.50 or 5.7.12.","what":"CVE-2026-107848 is a low-severity vulnerability in contao, published on 9 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-107848 and fix it if it is affected.\n\nWhat it is: CVE-2026-107848 is a low-severity vulnerability in contao, published on 9 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-107848 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- contao/core-bundle (Packagist): affected from 4.0.0; fixed in 5.3.50\n- contao/core-bundle (Packagist): affected from 4.0.0; fixed in 5.3.50\n- contao/core-bundle (Packagist): affected from 5.4.0-RC1; fixed in 5.7.12\n- contao/core-bundle (Packagist): affected from 5.4.0-RC1; fixed in 5.7.12\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-2026-107848/ (Markdown: https://insights.sbomify.com/CVE-2026-107848/index.md)","id":"CVE-2026-107848","markdown":"https://insights.sbomify.com/CVE-2026-107848/index.md","name":"CVE-2026-107848","record":{"aliases":["GHSA-9ff2-p842-45wq"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Contao CMS","requires_auth":"low_privilege","summary":"An attacker can trick authenticated backend users into executing state-changing actions via crafted URLs due to missing CSRF token validation on specific GET requests.","user_interaction":"required","vuln_class":"csrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":3.5,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-352","name":"Cross-Site Request Forgery"}],"description":"Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, RequestTokenListener validates REQUEST_TOKEN only for POST requests, while the declarative GET guard runs only when an act parameter is present. Backend actions dispatched through the key parameter can therefore execute without a CSRF token when an authenticated backend user loads an attacker-controlled URL. Reachable actions remain limited to modules available to that user, and the advisory demonstrates destructive or state-changing actions rather than privilege escalation. This issue is fixed in versions 5.3.50 and 5.7.12.","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":"Contao: Cross-site request forgery in custom backend actions","id":"CVE-2026-107848","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"csrf","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Contao: Improper access control in the preview links module","id":"CVE-2026-107850"},"packages":[{"ecosystem":"Packagist","fixed":["5.3.50"],"introduced":["4.0.0"],"last_affected":[],"package":"contao/core-bundle","purl":null,"source":"GHSA-9ff2-p842-45wq"},{"ecosystem":"Packagist","fixed":["5.3.50"],"introduced":["4.0.0"],"last_affected":[],"package":"contao/core-bundle","purl":"pkg:composer/contao/core-bundle","source":"GHSA-9ff2-p842-45wq"},{"ecosystem":"Packagist","fixed":["5.7.12"],"introduced":["5.4.0-RC1"],"last_affected":[],"package":"contao/core-bundle","purl":null,"source":"GHSA-9ff2-p842-45wq"},{"ecosystem":"Packagist","fixed":["5.7.12"],"introduced":["5.4.0-RC1"],"last_affected":[],"package":"contao/core-bundle","purl":"pkg:composer/contao/core-bundle","source":"GHSA-9ff2-p842-45wq"}],"prev":{"headline":"Contao: Cross-site scripting in the comments bundle","id":"CVE-2026-107845"},"products":["contao"],"published":"2026-10-09","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-13","vendors":["contao"]},"summary":"An attacker can trick authenticated backend users into executing state-changing actions via crafted URLs due to missing CSRF token validation on specific GET requests.","url":"https://insights.sbomify.com/CVE-2026-107848/"}