GHSA-c68q-h477-5646
Curl versions by default automatically respond to WebSocket PING frames without limiting memory allocation for unacknowledged frames. This allows a malicious WebSocket server to flood curl with rapid PING messages, potentially exhausting all available memory and causing a denial of service.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-11586 affects curl's handling of WebSocket PING frames. Curl automatically responds to these frames but does not impose an upper bound on memory allocation for unacknowledged frames. A malicious server can exploit this by sending a rapid sequence of PING messages, causing curl to allocate memory without limit, leading to memory exhaustion.
Potential Impact
An attacker controlling a WebSocket server can cause curl clients to consume excessive memory, potentially leading to denial of service due to resource exhaustion. There is no indication of code execution or data leakage from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should consider limiting exposure to untrusted WebSocket servers or using alternative tools that handle PING frames with memory limits.
GHSA-c68q-h477-5646
Description
Curl versions by default automatically respond to WebSocket PING frames without limiting memory allocation for unacknowledged frames. This allows a malicious WebSocket server to flood curl with rapid PING messages, potentially exhausting all available memory and causing a denial of service.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-11586 affects curl's handling of WebSocket PING frames. Curl automatically responds to these frames but does not impose an upper bound on memory allocation for unacknowledged frames. A malicious server can exploit this by sending a rapid sequence of PING messages, causing curl to allocate memory without limit, leading to memory exhaustion.
Potential Impact
An attacker controlling a WebSocket server can cause curl clients to consume excessive memory, potentially leading to denial of service due to resource exhaustion. There is no indication of code execution or data leakage from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should consider limiting exposure to untrusted WebSocket servers or using alternative tools that handle PING frames with memory limits.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-c68q-h477-5646
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-11586"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a483cb627e9c79719d82114
Added to database: 07/03/2026, 22:50:30 UTC
Last enriched: 07/03/2026, 23:03:50 UTC
Last updated: 07/04/2026, 01:54:15 UTC
Views: 4
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