Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. From 1.4.1 until 1.6.8, fromJSON and fromCrossJSON do not require an array node's element list to be an actual array. A small crafted payload can supply an attacker-controlled length that determines memory allocation and decoder iterations independently of payload size, allowing an unauthenticated request to exhaust the process or block its thread.
This issue is a residual bypass of the remediation for CVE-2026-23957. This issue is fixed in version 1.6.8.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
lxsmnsyc:seroval
References 3
https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-wp97-x4hv-qvhp
https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-wp97-x4hv-qvhp
https://github.com/lxsmnsyc/seroval/commit/cdcee3e3bc384ee844360844f8ea98fd2b27…
https://github.com/lxsmnsyc/seroval/commit/cdcee3e3bc384ee844360844f8ea98fd2b275d69
https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8
https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8