CVE-2026-106550

Summary

Mozilla's Node-convict (version 6.2.2 and later) is vulnerable to a Denial of Service vulnerability caused by incomplete prototype‑pollution protections in config.set(). An attacker controlling the configuration key can write arbitrary properties to constructor.<key>, which walk() resolves to the global Object function. This allows overwriting core JavaScript methods such as Object.assign, leading to persistent process-wide failures and requiring a restart. The issue bypasses existing filters that only block constructor.prototype.* and proto.*. Exploitation requires an endpoint that forwards attacker-controlled keys into config.set().

Affected Software

Weaknesses

• CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (‘Prototype Pollution’)
• CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes
• CWE-400: Uncontrolled Resource Consumption (‘Denial of Service’)

References

• https://github.com/mozilla/node-convict

• ←Previous
• Next→