CVE-2026-92708

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Source
https://cve.org/CVERecord?id=CVE-2026-92708
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92708.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-92708
Aliases
  • GHSA-j22f-vq7h-c4qm
Published
2026-09-18T19:54:28Z
Modified
2026-09-20T11:47:16Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
devalue: Cross-request process memory disclosure in devalue when `stringify` / `uneval` serialize Node Buffers
Details

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 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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-200",
        "CWE-226"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92708.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "5.1.0"
                },
                {
                    "fixed": "5.9.3"
                }
            ],
            "source": "AFFECTED_FIELD"
        },
        {
            "extracted_events": [
                {
                    "introduced": "Uint8Array"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}
References

Affected packages

Git / github.com/sveltejs/devalue

Affected ranges

Type
GIT
Repo
https://github.com/sveltejs/devalue
Events
Introduced
293d70bb7a3312741c370c8989fff0b5525647de
Fixed
a3d30d94c8fd9cfca4b774814ff9d5bfade5010c
Fixed
46dc877b3570dafb1cd3291b9bb48cecef8f7266
Fixed
53cd3db7dddf34bb8c2ab1ebc98dafd21daab918
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "5.1.0"
        },
        {
            "fixed": "5.9.2"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

v5.*
v5.1.0
v5.1.1
v5.3.0
v5.3.1
v5.3.2
v5.4.0
v5.4.1
v5.4.2
v5.5.0
v5.6.0
v5.6.1
v5.6.2
v5.6.3
v5.6.4
v5.7.0
v5.7.1
v5.8.0
v5.8.1
v5.8.2
v5.9.0
v5.9.1
v5.9.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92708.json"