CVE-2026-116580
Seroval facilitates JavaScript value stringification, including complex structures beyond…
- Risk score
- 49/100
- CVSS
- 7.3 v3.1
- Published
- 26 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 applicati…
- Affected
- See advisory
- Fix
- Upgrade the product to 1.6.8 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.3 high
- Remotely exploitable without logging in
References
- https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2
- https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d
- https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8
- https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9
Original description
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.
Last activity 26 Oct 2026. Patch Forecast updates every hour.