CVE-2026-116584
Seroval `fromJSON`/`fromCrossJSON` denial of service via unvalidated array node length
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.
Fixes and workarounds
Fix
seroval (npm): OSV reports a fixed version 1.6.8. Check the advisory for supported release branches.
Source: OSV GHSA-wp97-x4hv-qvhpAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| seroval lxsmnsyc |
>= 1.4.1, < 1.6.8 (affected) | CNA: GitHub_M |
serovalseroval
npm |
≥ 1.4.1; < 1.6.8 (affected, semver); OSV events: introduced 1.4.1; fixed 1.6.8Source events (semver)Other versions: unaffected |
OSV GHSA-wp97-x4hv-qvhp |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-wp97-x4hv-qvhpCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/lxsmnsyc/seroval/commit/cdcee3e3bc384ee844360844f8ea98fd2b275d69CNA: GitHub_M · x_refsource_MISC
- https://github.com/lxsmnsyc/seroval/releases/tag/[email protected]CNA: GitHub_M · x_refsource_MISC
- https://github.com/advisories/GHSA-wp97-x4hv-qvhpOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-wp97-x4hv-qvhpOSV / GitHub Security Advisories · osv
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