{"answers":{"affected":"2 open source packages ship an affected version, including cyberchef.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57439 exists.","fix":"Upgrade cyberchef to 11.2.0 or later.","what":"CVE-2026-57439 is a medium-severity code injection vulnerability in gchq CyberChef, published on 8 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-57439 and fix it if it is affected.\n\nWhat it is: CVE-2026-57439 is a medium-severity code injection vulnerability in gchq CyberChef, published on 8 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57439 exists.\n\nAffected packages and fixed versions:\n- cyberchef (npm): affected all versions; fixed in 11.2.0\n- cyberchef (npm): affected all versions; fixed in 11.2.0\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-2026-57439/ (Markdown: https://insights.sbomify.com/CVE-2026-57439/index.md)","id":"CVE-2026-57439","markdown":"https://insights.sbomify.com/CVE-2026-57439/index.md","name":"CVE-2026-57439","record":{"aliases":["GHSA-fx6f-382r-j72c"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"CyberChef web app","requires_auth":"none","summary":"Prototype pollution in CyberChef's Series Chart operation allows attackers to inject malicious JavaScript into HTML output via crafted CSV input.","user_interaction":"required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"},{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.2.0, the Series Chart operation accepts __proto__ as a key while parsing user-supplied CSV, allowing prototype pollution that can be chained with operations such as Parse UDP to inject malicious JavaScript into HTML output. This issue is fixed in version 11.2.0.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"CyberChef: Prototype pollution in Series Chart operation","id":"CVE-2026-57439","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":2,"n_references":5,"next":{"headline":"Mediawiki EmbedVideo Extension has stored XSS via malformed src url with $wgEmbedVideoRequireConsent disabled","id":"CVE-2026-57440"},"packages":[{"ecosystem":"npm","fixed":["11.2.0"],"introduced":["0"],"last_affected":[],"package":"cyberchef","purl":null,"source":"GHSA-fx6f-382r-j72c"},{"ecosystem":"npm","fixed":["11.2.0"],"introduced":["0"],"last_affected":[],"package":"cyberchef","purl":"pkg:npm/cyberchef","source":"GHSA-fx6f-382r-j72c"}],"prev":{"headline":"Nokogiri: Possible Use-After-Free in XInclude Processing","id":"CVE-2026-57438"},"products":["CyberChef"],"published":"2026-07-08","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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-08","vendors":["gchq"]},"summary":"Prototype pollution in CyberChef's Series Chart operation allows attackers to inject malicious JavaScript into HTML output via crafted CSV input.","url":"https://insights.sbomify.com/CVE-2026-57439/"}