AuthAllowed Aggregation Crash (CVE202613055) in MongoDB
CVE-2026-13055 Published on July 22, 2026
Server crash via aggregation pipeline expression with compound wildcard index specification
The `$_internalIndexKey` aggregation expression can be used by any authenticated user to crash a MongoDB server (mongod). The expression fails to handle compound wildcard index specifications, triggering an internal consistency check that aborts the server process. The user must be able to run an aggregation pipeline.
Vulnerability Analysis
CVE-2026-13055 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is an assertion failure Vulnerability?
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
CVE-2026-13055 has been classified to as an assertion failure vulnerability or weakness.
Products Associated with CVE-2026-13055
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Affected Versions
MongoDB Server:- Version 7.0 and below 7.0.39 is affected.
- Version 8.0 and below 8.0.28 is affected.
- Version 8.2.0 and below 8.2.12 is affected.
- Version 8.3.0 and below 8.3.7 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.