CVE-2026-59940 - Seroval: `seroval.fromJSON()` Promise resolver type confusion invokes attacker-controlled methods during deserialization
Brief
CVE ID : CVE-2026-59940
Published : Aug. 18, 2026, 2:34 p. m.
- 33 minutes ago
Description : Seroval facilitates JS value stringification, including complex structures beyond JSON. stringify capabilities. Prior to 1.
- 3, seroval.
fromJSON() allows attacker-controlled JSON Promise control nodes to operate on values from the general deserialization reference table without verifying genuine internal Promise resolver records, causing deserialization side effects with plugins enabled and potentially unintended server-side invocation or remote code execution when downstream frameworks register callable wrappers. This issue is fixed in version 1.
- 3.
Severity: 0.0
- NA