{"answers":{"affected":"4 open source packages ship an affected version, including craftcms/cms. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31857 in the wild and no public exploit code.","fix":"Upgrade craftcms/cms to a fixed version for your release line: 4.17.4 or 5.9.9.","what":"CVE-2026-31857 is a high-severity code injection vulnerability in Craftcms Craft Cms, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-31857 and fix it if it is affected.\n\nWhat it is: CVE-2026-31857 is a high-severity code injection vulnerability in Craftcms Craft Cms, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-31857 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- craftcms/cms (Packagist): affected from 4.0.0-beta.1; fixed in 4.17.4\n- craftcms/cms (Packagist): affected from 4.0.0-beta.1; fixed in 4.17.4\n- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.9.9\n- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.9.9\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-2026-31857/ (Markdown: https://insights.sbomify.com/CVE-2026-31857/index.md)","id":"CVE-2026-31857","markdown":"https://insights.sbomify.com/CVE-2026-31857/index.md","name":"CVE-2026-31857","record":{"aliases":["GHSA-fp5j-j7j4-mcxc"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Craft CMS","requires_auth":"none","summary":"Authenticated Craft CMS users can achieve remote code execution via unsandboxed Twig rendering in condition rules, bypassing security settings.","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":8.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U","version":"4.0"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"description":"Craft is a content management system (CMS). Prior to 5.9.9 and 4.17.4, a Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The BaseElementSelectConditionRule::getElementIds() method passes user-controlled string input through renderObjectTemplate() -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control Panel user (including non-admin roles such as Author or Editor) can achieve full RCE by sending a crafted condition rule via standard element listing endpoints. This vulnerability requires no admin privileges, no special permissions beyond basic control panel access, and bypasses all production hardening settings (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Users should update to the patched 5.9.9 or 4.17.4 release to mitigate the issue.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":"2026-08-24","github_poc":5,"max_poc_stars":1,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-30T03:17:31Z","kind":"github_poc","ref":"https://github.com/0Asylum/CVE-2026-31857","stars":1,"title":"CraftCMS has an RCE vulnerability via relational conditionals in the control panel"},{"date":"2026-10-08T08:48:46Z","kind":"github_poc","ref":"https://github.com/kaizoku73/CVE-2026-31857-PoC","stars":1,"title":"Proof of Concept for CVE-2026-31857, an authenticated Remote Code Execution vulnerability in Craft CMS caused by unsafe processing of user-controlled Twig expressions."},{"date":"2026-08-24T18:21:09Z","kind":"github_poc","ref":"https://github.com/TRX-0/CVE-2026-31857-craftcms-ssti","stars":0,"title":null},{"date":"2026-09-29T17:03:46Z","kind":"github_poc","ref":"https://github.com/0xTatsuki/CVE-2026-31857","stars":0,"title":"Craft CMS RCE via relational conditionals in the control panel"},{"date":"2026-10-05T17:57:10Z","kind":"github_poc","ref":"https://github.com/WhiteMachin3/CVE-2026-31857","stars":0,"title":"CVE-2026-31857 - Craft CMS authenticated RCE timing verifier."}],"tier":"poc_unverified"},"has_fix":true,"headline":"CraftCMS has an RCE vulnerability via relational conditionals in the control panel","id":"CVE-2026-31857","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"craftcms:craft_cms","products":["craftcms:craft_cms"],"type":"code_injection","year":"2026"},"n_packages":4,"n_references":2,"next":{"headline":"CraftCMS's `ElementSearchController` Affected by Blind SQL Injection","id":"CVE-2026-31858"},"packages":[{"ecosystem":"Packagist","fixed":["4.17.4"],"introduced":["4.0.0-beta.1"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-fp5j-j7j4-mcxc"},{"ecosystem":"Packagist","fixed":["4.17.4"],"introduced":["4.0.0-beta.1"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-fp5j-j7j4-mcxc"},{"ecosystem":"Packagist","fixed":["5.9.9"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-fp5j-j7j4-mcxc"},{"ecosystem":"Packagist","fixed":["5.9.9"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-fp5j-j7j4-mcxc"}],"prev":{"headline":"Parse Server has a SQL injection via `Increment` operation on nested object field in PostgreSQL","id":"CVE-2026-31856"},"products":["cms"],"published":"2026-03-11","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-12","vendors":["craftcms"]},"summary":"Authenticated Craft CMS users can achieve remote code execution via unsandboxed Twig rendering in condition rules, bypassing security settings.","url":"https://insights.sbomify.com/CVE-2026-31857/"}