{"answers":{"affected":"2 open source packages ship an affected version, including craftcms/cms. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33157 in the wild and no public exploit code.","fix":"Upgrade craftcms/cms to 5.9.13 or later.","what":"CVE-2026-33157 is a high-severity code injection vulnerability in Craftcms Craft Cms, published on 24 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-33157 and fix it if it is affected.\n\nWhat it is: CVE-2026-33157 is a high-severity code injection vulnerability in Craftcms Craft Cms, published on 24 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-33157 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- craftcms/cms (Packagist): affected from 5.6.0; fixed in 5.9.13\n- craftcms/cms (Packagist): affected from 5.6.0; fixed in 5.9.13\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-2026-33157/ (Markdown: https://insights.sbomify.com/CVE-2026-33157/index.md)","id":"CVE-2026-33157","markdown":"https://insights.sbomify.com/CVE-2026-33157/index.md","name":"CVE-2026-33157","record":{"aliases":["CLSA-2026-1790174106","GHSA-2fph-6v5w-89hh"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Craft CMS","requires_auth":"high_privilege","summary":"Authenticated users can execute arbitrary code via unsanitized field layout parameters in Craft CMS control panel.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"craft_cms","vendor":"craftcms"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-470","name":"Use of Externally-Controlled Input to Select Classes or Code"}],"description":"Craft CMS is a content management system (CMS). From version 5.6.0 to before version 5.9.13, a Remote Code Execution (RCE) vulnerability exists in Craft CMS, it can be exploited by any authenticated user with control panel access. This is a bypass of a previous fix. The existing patches add cleanseConfig() to assembleLayoutFromPost() and various FieldsController actions to strip Yii2 behavior/event injection keys (\"as\" and \"on\" prefixed keys). However, the fieldLayouts parameter in ElementIndexesController::actionFilterHud() is passed directly to FieldLayout::createFromConfig() without any sanitization, enabling the same behavior injection attack chain. This issue has been patched in version 5.9.13.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":"2026-09-21","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-21T19:16:15Z","kind":"github_poc","ref":"https://github.com/TRX-0/CVE-2026-33157-craftcms-rce","stars":0,"title":"Craft CMS CVE-2026-33157 filter-hud behavior-injection RCE PoC"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior","id":"CVE-2026-33157","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"craftcms:craft_cms","products":["craftcms:craft_cms"],"type":"code_injection","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)","id":"CVE-2026-33158"},"packages":[{"ecosystem":"Packagist","fixed":["5.9.13"],"introduced":["5.6.0"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-2fph-6v5w-89hh"},{"ecosystem":"Packagist","fixed":["5.9.13"],"introduced":["5.6.0"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-2fph-6v5w-89hh"}],"prev":{"headline":"DLL Sideloading in ScreenToGif","id":"CVE-2026-33156"},"products":["cms"],"published":"2026-03-24","related":[{"cvss_score":10,"headline":"Craft CMS Code Injection","id":"CVE-2025-32432","kev_date_added":"2026-03-20","published":"2025-04-25"},{"cvss_score":9.3,"headline":"Craft CMS Code Injection","id":"CVE-2024-56145","kev_date_added":"2025-06-02","published":"2024-12-18"},{"cvss_score":8.1,"headline":"Craft CMS Code Injection","id":"CVE-2025-23209","kev_date_added":"2025-02-20","published":"2025-01-18"},{"cvss_score":6.9,"headline":"Craft CMS External Control of Assumed-Immutable Web Parameter","id":"CVE-2025-35939","kev_date_added":"2025-06-02","published":"2025-05-07"},{"cvss_score":10,"headline":"Craft CMS Remote Code Execution vulnerability","id":"CVE-2023-41892","kev_date_added":null,"published":"2023-09-13"},{"cvss_score":9.8,"headline":"Craft CMS Remote Code Injection","id":"CVE-2021-27903","kev_date_added":null,"published":"2021-06-30"},{"cvss_score":9.8,"headline":"SEOmatic for CraftCMS allows Server-Side Template Injection","id":"CVE-2020-9757","kev_date_added":null,"published":"2020-03-04"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-25","vendors":["craftcms"]},"summary":"Authenticated users can execute arbitrary code via unsanitized field layout parameters in Craft CMS control panel.","url":"https://insights.sbomify.com/CVE-2026-33157/"}