{"answers":{"affected":"1 open source package ship an affected version, including devalue.","exploited":"There is no known exploitation of CVE-2026-123562 in the wild and no public exploit code.","exposure":"","fix":"Upgrade devalue to 5.9.3 or later.","what":"CVE-2026-123562 is a high-severity vulnerability in sveltejs devalue, published on 8 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123562 and fix it if it is affected.\n\nWhat it is: CVE-2026-123562 is a high-severity vulnerability in sveltejs devalue, published on 8 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123562 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- devalue (npm): affected from 5.8.0; 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/CVE-2026-123562/ (Markdown: https://insights.sbomify.com/CVE-2026-123562/index.md)","id":"CVE-2026-123562","markdown":"https://insights.sbomify.com/CVE-2026-123562/index.md","name":"CVE-2026-123562","record":{"aliases":["GHSA-6jpw-759r-8m52","GHSA-x5rw-q4pp-hg5g"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-248","name":"Uncaught Exception"}],"description":"devalue (sveltejs/devalue) 5.8.0 before 5.9.3 contains an unhandled promise rejection in stringifyAsync: when serializing multiple promises, a later promise rejecting before an earlier one settles leaves an internal rejection unhandled, even if the caller catches the returned promise. An attacker able to influence the timing or failure of serialized asynchronous values can terminate the Node.js process.","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":false,"headline":"Devalue 5.8.0 before 5.9.3 Denial of Service via stringifyAsync Unhandled Rejection","id":"CVE-2026-123562","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"Devalue before 5.9.3 Typed-Array Allocation Validation Bypass via parse","id":"CVE-2026-123563"},"nickname":null,"packages":[{"ecosystem":"npm","fixed":["5.9.3"],"introduced":["5.8.0"],"last_affected":[],"package":"devalue","purl":null,"source":"GHSA-x5rw-q4pp-hg5g"}],"prev":{"headline":"Sveltejs devalue before 5.9.3 __proto__ Rejection Bypass via Property-Key Coercion","id":"CVE-2026-123561"},"products":["devalue"],"published":"2026-11-08","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-11-09","vendors":["sveltejs"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123562/"}