Client resource exhaustion via uncapped chunked responses
Published Aug 1, 2026 · Updated Aug 1, 2026
Resource exhaustion in FreeRDP before 3.29.0 allows remote attackers controlling an RD Gateway endpoint to consume client memory. In libfreerdp/core/gateway/http.c, http_response_recv_body() grows the response stream for each chunk but never applies the 64 MiB RESPONSE_SIZE_LIMIT enforced for non-chunked bodies. Exposure requires a client connection to a malicious or compromised RD Gateway, and the confirmed consequence is memory consumption and client availability loss, not code execution or data disclosure.
Summary
What happened
Resource exhaustion in FreeRDP before 3.29.0 allows remote attackers controlling an RD Gateway endpoint to consume client memory. In libfreerdp/core/gateway/http.c, http_response_recv_body() grows the response stream for each chunk but never applies the 64 MiB RESPONSE_SIZE_LIMIT enforced for non-chunked bodies. Exposure requires a client connection to a malicious or compromised RD Gateway, and the confirmed consequence is memory consumption and client availability loss, not code execution or data disclosure.
The record
- CVE
- CVE-2026-67297
- Published
- Aug 1, 2026
- Updated
- Aug 1, 2026
- Vendor
- FreeRDP
- Product
- FreeRDP
- Classifications
- CWE-770, T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 1, 2026CVE publishedPublication date reported by the CVE source.
- Aug 1, 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=0 <3.29.0
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
- FreeRDP chunked-response parser reproductionproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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