{"answers":{"affected":"2 open source packages ship an affected version, including winter/wn-backend-module.","exploited":"There is no known exploitation of CVE-2026-35445 in the wild and no public exploit code.","fix":"Upgrade winter/wn-backend-module to 1.2.13 or later.","what":"CVE-2026-35445 is a high-severity vulnerability in wintercms winter, published on 26 Aug 2026."},"fix_prompt":"Check this codebase for CVE-2026-35445 and fix it if it is affected.\n\nWhat it is: CVE-2026-35445 is a high-severity vulnerability in wintercms winter, published on 26 Aug 2026. \nExploitation: There is no known exploitation of CVE-2026-35445 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- winter/wn-backend-module (Packagist): affected all versions; fixed in 1.2.13\n- winter/wn-backend-module (Packagist): affected all versions; fixed in 1.2.13\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-2026-35445/ (Markdown: https://insights.sbomify.com/CVE-2026-35445/index.md)","id":"CVE-2026-35445","markdown":"https://insights.sbomify.com/CVE-2026-35445/index.md","name":"CVE-2026-35445","record":{"aliases":["GHSA-j5jq-cr68-v2xx"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-285","name":"Improper Authorization"}],"description":"Winter CMS is a content management system built on the Laravel PHP framework. In versions prior to 1.2.13, the backend did not validate the handler name submitted through the form postback _handler POST field, allowing an authenticated backend user to invoke arbitrary controller methods, including protected, private, and action-prefixed ones. While AJAX requests validate that handler names match the on[A-Z][\\w+]* pattern, the postback path passed the submitted _handler value straight to the handler dispatcher with no such check, so any controller that exposes a public action or conditionally relaxes its $requiredPermissions check could be reached, bypassing the roles and permissions system. The built-in Users controller was affected because it set $requiredPermissions to null for the myaccount action, letting any authenticated backend user invoke user-management methods such as update_onDelete and update_onManualPasswordReset without holding the backend.manage_users permission. This issue is fixed in version 1.2.13.","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":"Winter: Authenticated backend users can bypass Users controller permission checks","id":"CVE-2026-35445","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"LORIS has a path traversal in FilesDownloadHandler","id":"CVE-2026-35446"},"packages":[{"ecosystem":"Packagist","fixed":["1.2.13"],"introduced":["0"],"last_affected":[],"package":"winter/wn-backend-module","purl":null,"source":"GHSA-j5jq-cr68-v2xx"},{"ecosystem":"Packagist","fixed":["1.2.13"],"introduced":["0"],"last_affected":[],"package":"winter/wn-backend-module","purl":"pkg:composer/winter/wn-backend-module","source":"GHSA-j5jq-cr68-v2xx"}],"prev":{"headline":"SDL_image has a heap buffer overflow READ via unchecked colormap index in XCF loader","id":"CVE-2026-35444"},"products":["winter"],"published":"2026-08-26","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":"2026-08-26","vendors":["wintercms"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-35445/"}