CVE-2026-116580
Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check
Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. 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-7rv5-mrxv-xcr9Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| seroval lxsmnsyc |
< 1.6.8 (affected) | CNA: GitHub_M |
serovalseroval
npm |
≥ 0; < 1.6.8 (affected, semver); OSV events: introduced 0; fixed 1.6.8Source events (semver)Other versions: unaffected |
OSV GHSA-7rv5-mrxv-xcr9 |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.3 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | 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-7rv5-mrxv-xcr9CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2CNA: GitHub_M · x_refsource_MISC
- https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8dCNA: 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-7rv5-mrxv-xcr9OSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-7rv5-mrxv-xcr9OSV / GitHub Security Advisories · osv
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