{"answers":{"affected":"2 open source packages ship an affected version, including seroval.","exploited":"There is no known exploitation of CVE-2026-116583 in the wild and no public exploit code.","fix":"Upgrade seroval to 1.6.11 or later.","what":"CVE-2026-116583 is a medium-severity vulnerability in lxsmnsyc seroval, published on 26 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-116583 and fix it if it is affected.\n\nWhat it is: CVE-2026-116583 is a medium-severity vulnerability in lxsmnsyc seroval, published on 26 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-116583 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- seroval (npm): affected from 1.6.0; fixed in 1.6.11\n- seroval (npm): affected from 1.6.0; fixed in 1.6.11\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-2026-116583/ (Markdown: https://insights.sbomify.com/CVE-2026-116583/index.md)","id":"CVE-2026-116583","markdown":"https://insights.sbomify.com/CVE-2026-116583/index.md","name":"CVE-2026-116583","record":{"aliases":["GHSA-f86p-h4j2-7qgj"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"},{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. From 1.6.0 until 1.6.11, the JavaScript-output APIs derive a typed array's constructor name from a property on the value that can be replaced by an own constructor property. When application code copies untrusted properties onto a typed array and then passes it to serialize, serializeAsync, crossSerialize, crossSerializeAsync, crossSerializeStream, Serializer, or compileJSON, the attacker-controlled name is written as executable JavaScript and can run in the page receiving the output. This issue is fixed in version 1.6.11.","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: Code injection through a typed array's own constructor property","id":"CVE-2026-116583","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Seroval `fromJSON`/`fromCrossJSON` denial of service via unvalidated array node length","id":"CVE-2026-116584"},"packages":[{"ecosystem":"npm","fixed":["1.6.11"],"introduced":["1.6.0"],"last_affected":[],"package":"seroval","purl":null,"source":"GHSA-f86p-h4j2-7qgj"},{"ecosystem":"npm","fixed":["1.6.11"],"introduced":["1.6.0"],"last_affected":[],"package":"seroval","purl":"pkg:npm/seroval","source":"GHSA-f86p-h4j2-7qgj"}],"prev":{"headline":"Seroval: Script injection through RegExp sources in serialized output","id":"CVE-2026-116582"},"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-27","vendors":["lxsmnsyc"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-116583/"}