Cyber Resilience

CVE-2025-53537

High

Published: 23 July 2025

Published
23 July 2025
Modified
05 August 2025
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0063 70.9th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-53537 is a high-severity Missing Release of Memory after Effective Lifetime (CWE-401) vulnerability in Oisf Libhtp. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 29.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-401

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

oisf
libhtp
≤ 0.5.51

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References