VulnerabilityAnalyzed

CVE-2025-52887

This leads to potential exhaustion of system memory and results in a server crash or unresponsiveness.

HIGH 7.5EPSS 0.43%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In version 0.21.0, when many http headers fields are passed in, the library does not limit the number of headers, and the memory associated with the headers will not be released when the connection is disconnected. This leads to potential exhaustion of system memory and results in a server crash or unresponsiveness. Version 0.22.0 contains a patch for the issue.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.43% probability · 36th percentile
CISA KEV: Not listed
Weakness: CWE-400
Affected: yhirose/cpp-httplib
Source: security-advisories@github.com

References

https://github.com/yhirose/cpp-httplib/commit/28dcf379e82a2cdb544d812696a7fd46067eb7f9Patch
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xjhg-gf59-p92hExploit, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.