What is CVE-2026-33745?

CVE-2026-33745 is a high-severity vulnerability in Yhirose Cpp-httplib, classified under Information Disclosure. CVSS score: 7.4/10. Published 2026-03-27.

How severe is CVE-2026-33745?

High severity. CVSS v3 base score is 7.4 out of 10.

Information disclosure in Yhirose Cpp-httplib

CVE-2026-33745

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.39.0, the cpp-httplib HTTP client forwards stored Basic Auth, Bearer Token, and Digest Auth credentials to arbitrary hosts when following cross-or…

Vulnerability class: Information Disclosure

EPSS: 0.001 (20.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Yhirose Cpp-httplib — versions < 0.39.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-6hrp-7fq9-3qv2 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-33745?: CVE-2026-33745 is a high-severity vulnerability in Yhirose Cpp-httplib, classified under Information Disclosure. CVSS score: 7.4/10. Published 2026-03-27.
How severe is CVE-2026-33745?: High severity. CVSS v3 base score is 7.4 out of 10.