CVE-2026-23956: high-severity vulnerability in lxsmnsyc seroval
seroval affected by Denial of Service via RegExp serialization
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 0.2.0 through 1.4.0, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). This issue has been fixed in version 1.4.1.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
lxsmnsyc · serovalRelated CVEs — lxsmnsyc seroval
In the same product, most dangerous first.
CVE-2026-59940CRITICALSeroval: `seroval.fromJSON()` Promise resolver type confusion invokes attacker-controlled methods during deserializationEPSS 0.8%CVE-2026-23737HIGHseroval Affected by Remote Code Execution via JSON DeserializationEPSS 0.6%CVE-2026-116581HIGHSeroval: fromJSON deserializer trusts sequence doneAt (unauthenticated event-loop DoS)EPSS 0.5%CVE-2026-24006HIGHSeroval affected by Denial of Service via Deeply Nested ObjectsEPSS 0.4%CVE-2026-23957HIGHseroval is vulnerable to Denial of Service via array serializationEPSS 0.4%CVE-2026-104845HIGHSeroval: Memory exhaustion via unchecked TypedArray length in JSON deserializationEPSS 0.4%