{"answers":{"affected":"2 open source packages ship an affected version, including seroval.","exploited":"There is no known exploitation of CVE-2026-116580 in the wild and no public exploit code.","fix":"Upgrade seroval to 1.6.8 or later.","what":"CVE-2026-116580 is a high-severity vulnerability in lxsmnsyc seroval, published on 26 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-116580 and fix it if it is affected.\n\nWhat it is: CVE-2026-116580 is a high-severity vulnerability in lxsmnsyc seroval, published on 26 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-116580 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- seroval (npm): affected all versions; fixed in 1.6.8\n- seroval (npm): affected all versions; fixed in 1.6.8\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-2026-116580/ (Markdown: https://insights.sbomify.com/CVE-2026-116580/index.md)","id":"CVE-2026-116580","markdown":"https://insights.sbomify.com/CVE-2026-116580/index.md","name":"CVE-2026-116580","record":{"aliases":["GHSA-7rv5-mrxv-xcr9"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8.","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":"Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check","id":"CVE-2026-116580","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Seroval: fromJSON deserializer trusts sequence doneAt (unauthenticated event-loop DoS)","id":"CVE-2026-116581"},"packages":[{"ecosystem":"npm","fixed":["1.6.8"],"introduced":["0"],"last_affected":[],"package":"seroval","purl":null,"source":"GHSA-7rv5-mrxv-xcr9"},{"ecosystem":"npm","fixed":["1.6.8"],"introduced":["0"],"last_affected":[],"package":"seroval","purl":"pkg:npm/seroval","source":"GHSA-7rv5-mrxv-xcr9"}],"prev":{"headline":"Autobahn Python: permessage-brotli inflates a whole frame before maxMessagePayloadSize is checked (incomplete fix of GHSA-hxp9-w8x3-p566)","id":"CVE-2026-116579"},"products":["seroval"],"published":"2026-10-26","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-26","vendors":["lxsmnsyc"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-116580/"}