MongoDB Replica Set Memory Exhaustion via Unbounded Wait Records (DoS)
CVE-2026-120828 Published on November 10, 2026
Memory exhaustion via abandoned far-future read-concern waiters in disaggregated storage
A replica-set database server node does not limit or reclaim internal wait records created while handling a client-supplied read option that names a point in time the node will never reach. A party with network access and no credentials can cause these records to accumulate without bound and persist after the requests end, which may make the server run out of memory and become unavailable.
Vulnerability Analysis
CVE-2026-120828 is exploitable with network access, and does not require authorization privileges or user interaction. 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 availability.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2026-120828
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Affected Versions
MongoDB Server:- Version 9.0.0 and below 9.0.7 is affected.
- Version 8.3.0 and below 8.3.16 is affected.
- Version 8.0.0 and below 8.0.37 is affected.
- Version 7.0.0 and below 7.0.48 is affected.
- Version 6.0.0 and below 6.0.30 is affected.
- Version 5.0.0 and below 5.0.35 is affected.
- Version 4.4.0 and below 4.4.32 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.