{"answers":{"affected":"4 open source packages ship an affected version, including @mikro-orm/core. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-34221 in the wild and no public exploit code.","fix":"Upgrade @mikro-orm/core to a fixed version for your release line: 6.6.10 or 7.0.6.","what":"CVE-2026-34221 is a high-severity unsafe deserialization vulnerability in mikro-orm, published on 31 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-2026-34221 and fix it if it is affected.\n\nWhat it is: CVE-2026-34221 is a high-severity unsafe deserialization vulnerability in mikro-orm, published on 31 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-2026-34221 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @mikro-orm/core (npm): affected all versions; fixed in 6.6.10\n- @mikro-orm/core (npm): affected all versions; fixed in 6.6.10\n- @mikro-orm/core (npm): affected from 7.0.0-dev.0; fixed in 7.0.6\n- @mikro-orm/core (npm): affected from 7.0.0-dev.0; fixed in 7.0.6\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-2026-34221/ (Markdown: https://insights.sbomify.com/CVE-2026-34221/index.md)","id":"CVE-2026-34221","markdown":"https://insights.sbomify.com/CVE-2026-34221/index.md","name":"CVE-2026-34221","record":{"aliases":["GHSA-qpfv-44f3-qqx6"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js ORM library","requires_auth":"none","summary":"Attacker-controlled input can pollute JavaScript prototypes via MikroORM's merge utility, potentially leading to code execution or privilege escalation.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"mikroorm","vendor":"mikro-orm"}],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:L/SA:L","version":"4.0"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"MikroORM is a TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Prior to versions 6.6.10 and 7.0.6, a prototype pollution vulnerability exists in the Utils.merge helper used internally by MikroORM when merging object structures. The function did not prevent special keys such as __proto__, constructor, or prototype, allowing attacker-controlled input to modify the JavaScript object prototype when merged. This issue has been patched in versions 6.6.10 and 7.0.6.","ecosystems":["npm"],"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":"MikroORM has Prototype Pollution in Utils.merge","id":"CVE-2026-34221","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"Open WebUI has Broken Access Control in Tool Valves","id":"CVE-2026-34222"},"packages":[{"ecosystem":"npm","fixed":["6.6.10"],"introduced":["0"],"last_affected":[],"package":"@mikro-orm/core","purl":null,"source":"GHSA-qpfv-44f3-qqx6"},{"ecosystem":"npm","fixed":["6.6.10"],"introduced":["0"],"last_affected":[],"package":"@mikro-orm/core","purl":"pkg:npm/%40mikro-orm/core","source":"GHSA-qpfv-44f3-qqx6"},{"ecosystem":"npm","fixed":["7.0.6"],"introduced":["7.0.0-dev.0"],"last_affected":[],"package":"@mikro-orm/core","purl":null,"source":"GHSA-qpfv-44f3-qqx6"},{"ecosystem":"npm","fixed":["7.0.6"],"introduced":["7.0.0-dev.0"],"last_affected":[],"package":"@mikro-orm/core","purl":"pkg:npm/%40mikro-orm/core","source":"GHSA-qpfv-44f3-qqx6"}],"prev":{"headline":"MikroORM is vulnerable to SQL Injection via specially crafted object","id":"CVE-2026-34220"},"products":["mikro-orm"],"published":"2026-03-31","related":[{"cvss_score":9.3,"headline":"MikroORM is vulnerable to SQL Injection via specially crafted object","id":"CVE-2026-34220","kev_date_added":null,"published":"2026-03-31"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-31","vendors":["mikro-orm"]},"summary":"Attacker-controlled input can pollute JavaScript prototypes via MikroORM's merge utility, potentially leading to code execution or privilege escalation.","url":"https://insights.sbomify.com/CVE-2026-34221/"}