{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2021-48012 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-48012 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-48012 is a high-severity vulnerability in Gin-Quin fast-toml, published on 12 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 CVE-2021-48012 and fix it if it is affected.\n\nWhat it is: CVE-2021-48012 is a high-severity vulnerability in Gin-Quin fast-toml, published on 12 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 CVE-2021-48012 in the wild and no public exploit code.\n\nAffected product: Gin-Quin fast-toml. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2021-48012/ (Markdown: https://insights.sbomify.com/CVE-2021-48012/index.md)","id":"CVE-2021-48012","markdown":"https://insights.sbomify.com/CVE-2021-48012/index.md","name":"CVE-2021-48012","record":{"aliases":["GHSA-qqfj-vf92-g76j"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"TOML parsing library","requires_auth":"none","summary":"Attackers can pollute Object.prototype via crafted TOML keys, leading to denial of service or authorization bypass in applications using fast-toml.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"fast-toml through 0.5.4 contains a prototype pollution vulnerability that allows attackers to modify Object.prototype by supplying TOML containing __proto__, constructor or prototype key segments. Attackers can pass [__proto__] or [constructor.prototype] table headers or __proto__.x dotted keys to parse() to pollute all objects, causing denial of service or authorization bypass.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"fast-toml through 0.5.4 Prototype Pollution via __proto__ Keys in Parsed TOML","id":"CVE-2021-48012","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"Weaver E-cology 8.0 Unauthenticated Path Traversal via ln.FileDownload","id":"CVE-2021-48013"},"packages":[],"prev":{"headline":"Servor 1.0.0 through 4.0.2 Unauthenticated Path Traversal via URL-Encoded Dot Segments","id":"CVE-2021-48011"},"products":["fast-toml"],"published":"2026-10-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-26","vendors":["Gin-Quin"]},"summary":"Attackers can pollute Object.prototype via crafted TOML keys, leading to denial of service or authorization bypass in applications using fast-toml.","url":"https://insights.sbomify.com/CVE-2021-48012/"}