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Wed, 15 Jul 2026 18:30:00 +0000
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ssvc
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Wed, 15 Jul 2026 17:30:00 +0000
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| Description | ws before 8.21.1 contains a memory exhaustion vulnerability in lib/receiver.js where the fragment guard only triggers when fragment count reaches maxFragments, allowing attackers to exhaust memory by sending incomplete fragmented WebSocket messages. Attackers can send a text frame with FIN=0 followed by continuation frames without completing the sequence, causing each fragment to be stored as a separate Buffer object with significant overhead, enabling denial of service through heap exhaustion. | |
| Title | ws < 8.21.1 Default maxFragments Allows Memory Exhaustion DoS | |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-07-15T17:55:32.359Z
Reserved: 2026-07-13T22:40:54.412Z
Link: CVE-2026-62389
Updated: 2026-07-15T17:55:28.387Z
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OpenCVE Enrichment
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