CVE-2025-53537 – LibHTP HTTP Protocol Parsing Memory Leak Vulnerability

CVE ID : CVE-2025-53537

Published : July 23, 2025, 9:15 p.m. | 1 hour, 46 minutes ago

Description : LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces. In versions 0.5.50 and below, there is a traffic-induced memory leak that can starve the process of memory, leading to loss of visibility. To workaround this issue, set `suricata.yaml app-layer.protocols.http.libhtp.default-config.lzma-enabled` to false. This issue is fixed in version 0.5.51.

Severity: 7.5 | HIGH

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