Memory Allocation Vulnerability in cpp-httplib HTTP/HTTPS Library
CVE-2025-53628

6.3MEDIUM

Key Information:

Vendor

Yhirose

Status
Cpp-httplib
Vendor
CVE Published:
10 July 2025

What is CVE-2025-53628?

The cpp-httplib library, which is a widely used single-file header-only HTTP/HTTPS library for C++, has a vulnerability that allows for arbitrary memory allocation due to the lack of limits on unique lines before version 0.20.1. This could potentially be exploited by attackers to manipulate memory allocation processes. The vulnerability has been addressed in the 0.20.1 release, which implements measures to prevent this type of exploitation. Further details and remediation strategies can be found in the related advisories.

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Affected Version(s)

cpp-httplib < 0.20.1

References

https://github.com/yhirose/cpp-httplib/security/advisorie...
x_refsource_CONFIRM
https://github.com/yhirose/cpp-httplib/security/advisorie...
x_refsource_MISC
https://github.com/yhirose/cpp-httplib/commit/7b752106ac4...
x_refsource_MISC

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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