{"answers":{"affected":"2 open source packages ship an affected version, including upmerge.","exploited":"There is no known exploitation of GHSA-gm9g-2g8v-fvxj in the wild and no public exploit code.","fix":"No fix has been published for GHSA-gm9g-2g8v-fvxj yet. Limit exposure of the affected software until one is available.","what":"GHSA-gm9g-2g8v-fvxj is a vulnerability in upmerge, published on 6 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for GHSA-gm9g-2g8v-fvxj and fix it if it is affected.\n\nWhat it is: GHSA-gm9g-2g8v-fvxj is a vulnerability in upmerge, published on 6 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of GHSA-gm9g-2g8v-fvxj in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- upmerge (npm): affected all versions up to 0.1.8; no fix listed\n- upmerge (npm): affected all versions up to 0.1.8; 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/GHSA-gm9g-2g8v-fvxj/ (Markdown: https://insights.sbomify.com/GHSA-gm9g-2g8v-fvxj/index.md)","id":"GHSA-gm9g-2g8v-fvxj","markdown":"https://insights.sbomify.com/GHSA-gm9g-2g8v-fvxj/index.md","name":"GHSA-gm9g-2g8v-fvxj","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript merge library","requires_auth":"none","summary":"Attackers can pollute object prototypes via the merge function, potentially causing denial of service or remote code execution in applications using this library.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"All versions of `upmerge` are vulnerable to Prototype Pollution. The merge() function fails to prevent user input to alter an Object's prototype, allowing attackers to modify override properties of all objects in the application. This may lead to Denial of Service or may be chained with other vulnerabilities leading to Remote Code Execution.\n\n## Recommendation\n\nNo fix is currently available. Consider using an alternative module until a fix is made available.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Prototype Pollution in upmerge","id":"GHSA-gm9g-2g8v-fvxj","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2019"},"n_packages":2,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["0.1.8"],"package":"upmerge","purl":null,"source":"GHSA-gm9g-2g8v-fvxj"},{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["0.1.8"],"package":"upmerge","purl":"pkg:npm/upmerge","source":"GHSA-gm9g-2g8v-fvxj"}],"products":null,"published":"2019-06-06","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"Attackers can pollute object prototypes via the merge function, potentially causing denial of service or remote code execution in applications using this library.","url":"https://insights.sbomify.com/GHSA-gm9g-2g8v-fvxj/"}