CVE-2026-23957 is a high severity vulnerability with a CVSS score of 7.5. No known exploits currently, and patches are available.
Very low probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
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.
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