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().
History

Fri, 09 Oct 2026 08:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla convict
Vendors & Products Mozilla
Mozilla convict

Wed, 07 Oct 2026 19:45:00 +0000


Wed, 07 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 07 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1321
CWE-400

Wed, 07 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1136

Wed, 07 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-915
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Wed, 07 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1136

Tue, 06 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Description 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().
Title CVE-2026-106550
References

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published: 2026-10-06T20:09:55.919Z

Updated: 2026-10-07T19:33:03.505Z

Reserved: 2026-10-06T20:07:46.075Z

Link: CVE-2026-106550

cve-icon Vulnrichment

Updated: 2026-10-07T15:05:07.527Z

cve-icon NVD

Status : Deferred

Published: 2026-10-06T21:17:18.810

Modified: 2026-10-07T20:17:10.790

Link: CVE-2026-106550

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-06T20:09:55Z

Links: CVE-2026-106550 - Bugzilla