{"affected":[{"defaultStatus":"unaffected","ecosystem":"npm","packageName":"devalue","product":"devalue","source":"CNA: VulnCheck","vendor":"sveltejs","versions":[{"lessThan":"5.6.3","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"5.6.3","versionType":"semver"}]},{"defaultStatus":"unaffected","ecosystem":"npm","packageName":"devalue","product":"devalue","source":"OSV GHSA-8qm3-746x-r74r","vendor":"","versions":[{"events":[{"introduced":"0"},{"fixed":"5.6.3"}],"lessThan":"5.6.3","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-123568","cwes":["CWE-1321"],"description":"Sveltejs devalue before 5.6.3 contains a prototype pollution vulnerability that allows attackers to alter object prototypes by supplying untrusted data to uneval. When the generated code is later evaluated, it creates objects with polluted prototypes, producing output data whose shape differs from the original input.","epss":{"date":"2026-11-10","percentile":0.10188,"score":0.00202},"exploits":[],"kev":null,"metrics":[{"score":2.1,"severity":"low","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"},{"score":4.4,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},{"score":2.1,"severity":"low","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":4.4,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N","version":"3.1"}],"modifiedAt":1794488617545,"publishedAt":1794101886526,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-8qm3-746x-r74r"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/sveltejs-devalue-before-5.6.3-prototype-pollution-via-uneval-output"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-8qm3-746x-r74r"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/sveltejs-devalue-before-5.6.3-prototype-pollution-via-uneval-output"},{"source":"OSV / GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/advisories/GHSA-8qm3-746x-r74r"},{"source":"OSV / GitHub Security Advisories","tags":["osv"],"url":"https://osv.dev/vulnerability/GHSA-8qm3-746x-r74r"}],"remediation":[{"kind":"fix","source":"OSV GHSA-8qm3-746x-r74r","text":"devalue (npm): OSV reports a fixed version 5.6.3. Check the advisory for supported release branches.","url":"https://github.com/advisories/GHSA-8qm3-746x-r74r"}],"revision":"a885aa89c8c1a9589d963559b0581493fb13352f8cc188b33197b8526576d849","sources":[{"modifiedAt":1794488617545,"name":"CNA: VulnCheck","retrievedAt":1794492541773,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123568"},{"modifiedAt":1794104209513,"name":"NVD","retrievedAt":1794118576205,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123568"},{"modifiedAt":1794135371293,"name":"OSV / GitHub Security Advisories","retrievedAt":1794492542211,"url":"https://osv.dev/vulnerability/GHSA-8qm3-746x-r74r"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794377570973,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123568"}],"ssvc":{"assessedAt":1794488583428,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Sveltejs devalue before 5.6.3 Prototype Pollution via uneval Output","updatedAt":1794492542211}