{"id":"CVE-2026-92708","title":"Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job","summary":"Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. In versions 5.1.0 through 5.9.2, stringify and uneval functions serialize a typed array by emitting its entire b…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-200","CWE-226","CWE-201"],"vendor":"sveltejs","product":"devalue","affected":["devalue >= 5.1.0, < 5.9.3"],"published":"2026-09-18","updated":"2026-09-23","sourceUpdated":"2026-09-23T20:17:22.253","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92708","references":[{"url":"https://github.com/sveltejs/devalue/commit/46dc877b3570dafb1cd3291b9bb48cecef8f7266","label":"security-advisories@github.com"},{"url":"https://github.com/sveltejs/devalue/releases/tag/v5.9.3","label":"security-advisories@github.com"},{"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-j22f-vq7h-c4qm","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92708.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92708"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2538811"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92708"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92708"},{"url":"https://github.com/advisories/GHSA-j22f-vq7h-c4qm"},{"url":"https://access.redhat.com/errata/RHSA-2026:84734"}],"tags":["nvd","cve.org","csaf","vex","red-hat","ghsa","npm"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-23T19:38:28.127737Z"},"epss":0.00725,"epssPercentile":0.53864,"ingestedAt":"2026-09-18T20:51:25.687Z","aliases":["GHSA-j22f-vq7h-c4qm"],"ecosystem":"npm","patched":["devalue 5.9.3"],"slug":"CVE-2026-92708","body":"## Overview\n\nSvelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. In versions 5.1.0 through 5.9.2, stringify and uneval functions serialize a typed array by emitting its entire backing ArrayBuffer rather than only the view, so serializing a Node Buffer, whose backing store is a process-wide shared pool, discloses up to 64 KB of unrelated process memory, including bytes from other in-flight requests. In a server-side-rendered framework such as SvelteKit or Nuxt, a public page whose load() returns a small Buffer, or that reads a small file, can therefore ship another user's request body or Authorization header in its HTML without authentication. Because this occurs during serialization, it fires on every such render and is not mitigated by the parse/unflatten prototype-pollution and denial-of-service guards, which only apply when parsing untrusted input. As a workaround, convert Node Buffer objects to Uint8Array before serialization. This issue has been fixed in version 5.9.3.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Build of Podman Desktop · no fix planned: Red Hat Build of Podman Desktop · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92708.json)\n- **RHSA-2026:84734** · Red Hat · fixed in: Red Hat OpenShift AI 3.4 · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84734)\n\n## Package advisory (CVE-2026-92708)\n\nAffected packages:\n\n- `devalue >= 5.1.0, <= 5.9.2`\n\nPatched in:\n\n- `devalue 5.9.3`\n\nSource: https://github.com/advisories/GHSA-j22f-vq7h-c4qm","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}