Vulnerability · Published Jul 10, 2025 · Assigned by GitHub_M
CVE-2025-53628cpp-httplib does not limit the length of a line
Medium 6.3
In plain English
A medium-severity infinite loop in cpp-httplib from yhirose. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | cpp-httplib | no fix listed | DEBIAN-CVE-2025-53628 |
| Debian:13 | cpp-httplib | no fix listed | DEBIAN-CVE-2025-53628 |
| Debian:14 | cpp-httplib | 0.25.0+ds-3 | DEBIAN-CVE-2025-53628 |
| Ubuntu:25.10 | cpp-httplib | no fix listed | UBUNTU-CVE-2025-53628 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| yhirose | cpp-httplib | < 0.20.1 |
Weakness: CWE-835, CWE-770 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N