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CVE

CVE-2026-23956

seroval affected by Denial of Service via RegExp serialization
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CVE

CVE-2026-23956

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Related Resources

No items found.

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

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00027%
EPSS Percentile
0.07196%
Introduced Version
0,1.4.0,0.13.0,0.12.0,0.10.1,0.8.0,0.7.0,0.4.0-alpha.18,0.4.0-alpha.12,0.4.0-alpha.11
Fix Available
1.4.1

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