Service crash via trusted MongoDB message lengths
Published Jan 14, 2026 · Updated Jan 14, 2026
Buffer handling flaws in Elastic Packetbeat allow adjacent attackers to crash the service via malformed MongoDB traffic on a monitored interface. The MongoDB parser trusts negative or oversized message lengths during truncation, BSON slicing, and reply allocation, causing a runtime panic or memory exhaustion. MongoDB parsing must be enabled and the forged traffic must cross the monitored interface; the reported consequence is loss of Packetbeat availability.
Summary
What happened
Buffer handling flaws in Elastic Packetbeat allow adjacent attackers to crash the service via malformed MongoDB traffic on a monitored interface. The MongoDB parser trusts negative or oversized message lengths during truncation, BSON slicing, and reply allocation, causing a runtime panic or memory exhaustion. MongoDB parsing must be enabled and the forged traffic must cross the monitored interface; the reported consequence is loss of Packetbeat availability.
The record
- CVE
- CVE-2026-0529
- Published
- Jan 14, 2026
- Updated
- Jan 14, 2026
- Vendor
- Elastic
- Product
- Packetbeat
- Classifications
- CWE-129, CAPEC-100, T1489
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 14, 2026CVE publishedPublication date reported by the CVE source.
- Jan 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=7.0.0 <=7.17.29
- Affected versionversion=8.0.0 <=8.19.9
- Affected versionversion=9.0.0 <=9.1.9
- Affected versionversion=9.2.0 <=9.2.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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