# CVE-2025-53537

## Summary

- **CVE ID:** CVE-2025-53537
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-401
- **Published:** Jul 23, 2025
- **Last Modified:** Mar 13, 2026

## 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.

## Affected Products

- OISF — libhtp (< 0.5.51)

## References

- [CNA](https://github.com/OISF/libhtp/security/advisories/GHSA-v3qq-h8mh-vph7)
- [CNA](https://github.com/OISF/libhtp/commit/9037ea35110a0d97be5cedf8d31fb4cd9a38c7a7)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.2

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._