{"answers":{"affected":"2 open source packages ship an affected version, including mixme. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-28860 in the wild and no public exploit code.","fix":"Upgrade mixme to 0.5.1 or later.","what":"CVE-2021-28860 is a critical vulnerability in n/a, published on 3 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-28860 and fix it if it is affected.\n\nWhat it is: CVE-2021-28860 is a critical vulnerability in n/a, published on 3 May 2021. 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-2021-28860 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- mixme (npm): affected all versions; fixed in 0.5.1\n- mixme (npm): affected all versions; fixed in 0.5.1\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-2021-28860/ (Markdown: https://insights.sbomify.com/CVE-2021-28860/index.md)","id":"CVE-2021-28860","markdown":"https://insights.sbomify.com/CVE-2021-28860/index.md","name":"CVE-2021-28860","record":{"aliases":["CVE-2021-29491","GHSA-r5cq-9537-9rpf"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js mixme library","requires_auth":"none","summary":"An attacker can cause denial of service in applications using the mixme library by polluting the prototype via mutate or merge functions.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"mixme","vendor":"adaltas"}],"cvss":{"score":9.1,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"In Node.js mixme, prior to v0.5.1, an attacker can add or alter properties of an object via '__proto__' through the mutate() and merge() functions. The polluted attribute will be directly assigned to every object in the program. This will put the availability of the program at risk causing a potential denial of service (DoS).","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":"Prototype Pollution in mixme","id":"CVE-2021-28860","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2021"},"n_packages":2,"n_references":5,"next":{"headline":"Open redirect in n/a","id":"CVE-2021-28861"},"packages":[{"ecosystem":"npm","fixed":["0.5.1"],"introduced":["0"],"last_affected":[],"package":"mixme","purl":null,"source":"GHSA-r5cq-9537-9rpf"},{"ecosystem":"npm","fixed":["0.5.1"],"introduced":["0"],"last_affected":[],"package":"mixme","purl":"pkg:npm/mixme","source":"GHSA-r5cq-9537-9rpf"}],"prev":{"headline":"Information disclosure in n/a","id":"CVE-2021-28858"},"products":["n/a"],"published":"2021-05-03","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":"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-07-09","vendors":["n/a"]},"summary":"An attacker can cause denial of service in applications using the mixme library by polluting the prototype via mutate or merge functions.","url":"https://insights.sbomify.com/CVE-2021-28860/"}