seroval affected by Denial of Service via RegExp serialization
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).
Mitigation:
Seroval introduces disabledFeatures (a bitmask) in serialization/deserialization methods, with Feature.RegExp as a dedicated flag. Users are recommended to configure disabledFeatures to disable RegExp serialization entirely.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | seroval | >= 0.2.0, < 1.4.1 | 1.4.1 |
References
- https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr
- https://nvd.nist.gov/vuln/detail/CVE-2026-23956
- https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060
- https://github.com/lxsmnsyc/seroval
- https://github.com/lxsmnsyc/seroval/blob/v0.2.0/packages/seroval/src/index.ts#L90
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-1333- Platform
- npm
- Package
seroval- Disclosed
- 21.01.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-hx9m-jf43-8ffr - CC BY 4.0
Vulnerability history: seroval
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 01.2026 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 6
Disclosures per year
- 2026: 8
-
seroval affected by Denial of Service via RegExp serialization this entry
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