CVE-2026-104846Critical· 9.8▾ MidnightSeroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. From 0.12.0 until 1.6.2, fromJSON deserialization of a fulfilled Promise control node can pass a plugin-produced callable-bear…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
Last analysed / modified upstream
Seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. From 0.12.0 until 1.6.2, fromJSON deserialization of a fulfilled Promise control node can pass a plugin-produced callable-bearing thenable to a native Promise resolver. ECMAScript thenable assimilation then invokes the callable unexpectedly, allowing attacker-controlled JSON to trigger code in applications using plugin-capable Seroval releases. This path bypasses the Promise resolver type-confusion remediation in version 1.5.3 for CVE-2026-59940 because the unexpected invocation occurs through native Promise settlement after the referenced value is deserialized. This issue is fixed in version 1.6.2.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
seroval >= 0.12.0, <= 1.6.0Patched in:
seroval 1.6.2Connected by shared product, vendor, weakness, or advisory.
CVE-2026-59940Critical· 9.8Seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities
CVE-2026-104845High· 7.5Seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities
CVE-2026-116583Medium· 5.3Seroval: Code injection through a typed array's own constructor property
CVE-2026-116584High· 7.5Seroval `fromJSON`/`fromCrossJSON` denial of service via unvalidated array node length
CVE-2026-116582Medium· 4.7Seroval: Script injection through RegExp sources in serialized output
CVE-2026-116581High· 7.5Seroval: fromJSON deserializer trusts sequence doneAt (unauthenticated event-loop DoS)