{"answers":{"affected":"1 open source package ship an affected version, including devalue.","exploited":"There is no known exploitation of CVE-2026-123569 in the wild and no public exploit code.","exposure":"","fix":"Upgrade devalue to 5.6.3 or later.","what":"CVE-2026-123569 is a high-severity vulnerability in sveltejs devalue, published on 8 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123569 and fix it if it is affected.\n\nWhat it is: CVE-2026-123569 is a high-severity vulnerability in sveltejs devalue, published on 8 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123569 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- devalue (npm): affected all versions; fixed in 5.6.3\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-2026-123569/ (Markdown: https://insights.sbomify.com/CVE-2026-123569/index.md)","id":"CVE-2026-123569","markdown":"https://insights.sbomify.com/CVE-2026-123569/index.md","name":"CVE-2026-123569","record":{"aliases":["GHSA-33hq-fvwr-56pm","GHSA-hf27-79c5-2rv5"],"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-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"The devalue package for npm before 5.6.3 can consume excessive CPU and memory when serializing sparse arrays with uneval or stringify. An attacker who manages to get a sparse array created on the server, which mainstream wire formats do not allow, and serialized there can cause a denial of service.","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 before 5.6.3 Denial of Service via Sparse Array Serialization","id":"CVE-2026-123569","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"Hickory DNS from 0.18 before 0.26.2 Memory Amplification DoS via RR Counts","id":"CVE-2026-123570"},"nickname":null,"packages":[{"ecosystem":"npm","fixed":["5.6.3"],"introduced":["0"],"last_affected":[],"package":"devalue","purl":null,"source":"GHSA-33hq-fvwr-56pm"}],"prev":{"headline":"Sveltejs devalue before 5.6.3 Prototype Pollution via uneval Output","id":"CVE-2026-123568"},"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":"2026-11-10","vendors":["sveltejs"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123569/"}