{"answers":{"affected":"2 open source packages ship an affected version, including devalue.","exploited":"There is no known exploitation of GHSA-4q55-j62x-fr9h in the wild and no public exploit code.","fix":"Upgrade devalue to 5.9.3 or later.","what":"GHSA-4q55-j62x-fr9h is a vulnerability in devalue, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for GHSA-4q55-j62x-fr9h and fix it if it is affected.\n\nWhat it is: GHSA-4q55-j62x-fr9h is a vulnerability in devalue, published on 1 Oct 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 GHSA-4q55-j62x-fr9h in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- devalue (npm): affected all versions; fixed in 5.9.3\n- devalue (npm): affected all versions; fixed in 5.9.3\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-4q55-j62x-fr9h/ (Markdown: https://insights.sbomify.com/GHSA-4q55-j62x-fr9h/index.md)","id":"GHSA-4q55-j62x-fr9h","markdown":"https://insights.sbomify.com/GHSA-4q55-j62x-fr9h/index.md","name":"GHSA-4q55-j62x-fr9h","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"patch","impacts":["other"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript serialization library","requires_auth":"none","summary":"Malformed keys in devalue bypass __proto__ rejection, potentially allowing prototype pollution, though impact is deemed unlikely.","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":"This is another instance of https://github.com/sveltejs/devalue/security/advisories/GHSA-mwv9-gp5h-frr4, where some payloads could cause `parse` to create objects with a `__proto__` own property. This on its own is not enough to cause prototype pollution, and indeed this is actually how `JSON.parse` works, but we decided to be a little more defensive here and not allow the creation of objects with `__proto__` own-properties. It is very unlikely for this to cause any issues.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":true,"headline":"devalue: Malformed null-prototype object keys bypass __proto__ rejection via property-key coercion","id":"GHSA-4q55-j62x-fr9h","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2026"},"n_packages":2,"n_references":null,"packages":[{"ecosystem":"npm","fixed":["5.9.3"],"introduced":["0"],"last_affected":[],"package":"devalue","purl":null,"source":"GHSA-4q55-j62x-fr9h"},{"ecosystem":"npm","fixed":["5.9.3"],"introduced":["0"],"last_affected":[],"package":"devalue","purl":"pkg:npm/devalue","source":"GHSA-4q55-j62x-fr9h"}],"products":null,"published":"2026-10-01","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":"Malformed keys in devalue bypass __proto__ rejection, potentially allowing prototype pollution, though impact is deemed unlikely.","url":"https://insights.sbomify.com/GHSA-4q55-j62x-fr9h/"}