CVE-2026-123563: Devalue before 5.9.3 Typed-Array Allocation Validation Bypass via parse
sveltejs · devalue
Fixed in 5.9.3 · Affected: sveltejs devalue before 5.9.3 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 32% of scored CVEs
DescriptionCVE.org
Devalue before 5.9.3 contains a validation bypass vulnerability that allows custom ArrayBuffer revivers to skip typed-array allocation checks in the parse function. Attackers can supply very small crafted input processed by a malformed ArrayBuffer reviver to allocate massive ArrayBuffers, causing memory exhaustion and denial of service.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- sveltejs · devaluebefore 5.9.3
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- sveltejs
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-123563 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.