Service interruption via nonterminating packet-processing loop
Published Jul 22, 2026 · Updated Jul 22, 2026
Denial of service in OpenCanary 0.9.8's MongoDB module allows remote attackers to monopolize one CPU core with a single packet. The module does not validate the triggering packet before entering a loop whose exit condition cannot be reached, leaving the Twisted process spinning. The MongoDB module must be enabled and network-reachable; the reported consequence is CPU starvation of its core rather than data access or modification.
Summary
What happened
Denial of service in OpenCanary 0.9.8's MongoDB module allows remote attackers to monopolize one CPU core with a single packet. The module does not validate the triggering packet before entering a loop whose exit condition cannot be reached, leaving the Twisted process spinning. The MongoDB module must be enabled and network-reachable; the reported consequence is CPU starvation of its core rather than data access or modification.
The record
- CVE
- CVE-2026-16551
- Published
- Jul 22, 2026
- Updated
- Jul 22, 2026
- Vendor
- Thinkst Applied Research
- Product
- OpenCanary
- Classifications
- CWE-20, CWE-835, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 22, 2026CVE publishedPublication date reported by the CVE source.
- Jul 22, 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=0.9.8
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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