Memory Leak Vulnerability in LibHTP Affects HTTP Protocol Processing
CVE-2025-53537

7.5HIGH

Key Information:

Vendor

Oisf

Status
Libhtp
Vendor
CVE Published:
23 July 2025

What is CVE-2025-53537?

LibHTP, a parser designed for secure HTTP protocol processing, contains a memory leak in versions 0.5.50 and earlier. This vulnerability allows for traffic-induced memory leaks, potentially leading to a significant depletion of memory resources. Such a condition can result in degraded performance and loss of visibility for services relying on LibHTP. To mitigate this issue, users are advised to disable the LZMA compression option by modifying the configuration in suricata.yaml. This vulnerability has been addressed in LibHTP version 0.5.51.

Affected Version(s)

libhtp < 0.5.51

References

https://github.com/OISF/libhtp/security/advisories/GHSA-v...
x_refsource_CONFIRM
https://github.com/OISF/libhtp/commit/9037ea35110a0d97be5...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-53537 : Memory Leak Vulnerability in LibHTP Affects HTTP Protocol Processing