{"answers":{"affected":"2 open source packages ship an affected version, including @brikcss/merge.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6594 exists.","fix":"No fix has been published for CVE-2026-6594 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-6594 is a medium-severity code injection vulnerability in brikcss merge, published on 20 Apr 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-2026-6594 and fix it if it is affected.\n\nWhat it is: CVE-2026-6594 is a medium-severity code injection vulnerability in brikcss merge, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6594 exists.\n\nAffected packages and fixed versions:\n- @brikcss/merge (npm): affected all versions up to 1.3.1; no fix listed\n- @brikcss/merge (npm): affected all versions up to 1.3.1; no fix listed\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-2026-6594/ (Markdown: https://insights.sbomify.com/CVE-2026-6594/index.md)","id":"CVE-2026-6594","markdown":"https://insights.sbomify.com/CVE-2026-6594/index.md","name":"CVE-2026-6594","record":{"aliases":["GHSA-3jc6-6r48-v6qf"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript merge library","requires_auth":"none","summary":"Remote attackers can exploit prototype pollution in brikcss merge to execute arbitrary code or escalate privileges via manipulated object properties.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X","version":"4.0"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"},{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototype attributes. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"brikcss merge prototype pollution","id":"CVE-2026-6594","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"ProjectsAndPrograms School Management System HTTP GET Parameter buslocation.php sql injection","id":"CVE-2026-6595"},"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["1.3.1"],"package":"@brikcss/merge","purl":null,"source":"GHSA-3jc6-6r48-v6qf"},{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["1.3.1"],"package":"@brikcss/merge","purl":"pkg:npm/%40brikcss/merge","source":"GHSA-3jc6-6r48-v6qf"}],"prev":{"headline":"ComfyUI View Endpoint server.py cross site scripting","id":"CVE-2026-6593"},"products":["merge"],"published":"2026-04-20","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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-20","vendors":["brikcss"]},"summary":"Remote attackers can exploit prototype pollution in brikcss merge to execute arbitrary code or escalate privileges via manipulated object properties.","url":"https://insights.sbomify.com/CVE-2026-6594/"}