Service interruption via unbounded connection threads
Published Feb 25, 2026 · Updated Feb 25, 2026
Uncontrolled resource consumption in TinyWeb before 2.02 allows remote attackers to interrupt service via slow HTTP connections. The SrvMain.pas acceptance loop creates a THTTPServerThread for every accepted socket without a concurrency limit or suitable idle timeout. No authentication is required; many minimally active connections retain threads and stack memory until legitimate clients cannot connect.
Summary
What happened
Uncontrolled resource consumption in TinyWeb before 2.02 allows remote attackers to interrupt service via slow HTTP connections. The SrvMain.pas acceptance loop creates a THTTPServerThread for every accepted socket without a concurrency limit or suitable idle timeout. No authentication is required; many minimally active connections retain threads and stack memory until legitimate clients cannot connect.
The record
- CVE
- CVE-2026-27630
- Published
- Feb 25, 2026
- Updated
- Feb 25, 2026
- Vendor
- Maxim Masiutin
- Product
- TinyWeb
- Classifications
- CWE-400, CWE-770, T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 25, 2026CVE publishedPublication date reported by the CVE source.
- Feb 25, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 2.02
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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