CVE-2026-13055 Server crash via aggregation pipeline expression with compound wildcard index specification
An authenticated user can crash the MongoDB server by using a specific aggregation pipeline expression with compound wildcard index specifications.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-13055?
CVE-2026-13055 is a high-severity denial of service vulnerability in Mongodb Mongodb, published on 22 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-617
Which versions are affected by CVE-2026-13055?
1 open source package ship an affected version, including mongodb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mongodb Bitnami | From 7.0.0 | 7.0.39, 8.0.28, 8.2.12, 8.3.7 |
Products include Mongodb Mongodb.
How do I fix CVE-2026-13055?
Upgrade mongodb to a fixed version for your release line: 7.0.39, 8.0.28, 8.2.12 or 8.3.7.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-13055 being exploited?
There is no known exploitation of CVE-2026-13055 in the wild and no public exploit code.
Other vulnerabilities in Mongodb Mongodb
- CVE-2025-14847 MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency
- CVE-2026-82067 Auth bypass in MongoDB Server
- CVE-2026-13072 MongoDB Improper Input Validation in Compute Mode External Data Processing Leading to Memory Corruption
- CVE-2017-15535 Denial of service in n/a
- CVE-2026-18691 Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure
Sources
Also known as BIT-mongodb-2026-13055, GHSA-c3m4-h7px-8423, MINI-44mf-v23g-47m9, MINI-9c29-5r46-q56p, MINI-mqx4-pg34-x65p, MINI-q553-cc97-v6jx and 1 more.