CVE-2026-23957
Seroval affected by Denial of Service via Array serialization
7.5
HIGH
CVSS 3.1
EPSS 0.04%
Description
Overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to **significantly increase processing time**. **Mitigation**: `Seroval` no longer encodes array lengths. Instead, it computes length using `Array.prototype.length` during deserialization.
How to fix CVE-2026-23957
To remediate CVE-2026-23957, upgrade the affected package to a fixed version below.
- —upgrade to 1.4.1 or later
Is CVE-2026-23957 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.4.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |