CVE-2025-53628

HIGH
Published Jul 10, 2025 Modified Aug 6, 2025 CWE-770 CWE-835 CWE-444

Description

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.

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CVSS v3.1 Score

8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-770 CWE-770
CWE-835 CWE-835
CWE-444 CWE-444

Affected Products

Vendor Product
yhirose cpp-httplib

References

Frequently Asked Questions

What is CVE-2025-53628? +
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629. It has a CVSS v3.1 base score of 8.8 (HIGH).
How severe is CVE-2025-53628? +
CVE-2025-53628 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2025-53628? +
CVE-2025-53628 affects products from yhirose, specifically: cpp-httplib. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-53628? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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