Bug 2452074 (CVE-2026-33745)

Summary: CVE-2026-33745 cpp-httplib: cpp-httplib: Information disclosure of credentials via cross-origin HTTP redirects
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: pemensik
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
URL: https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-6hrp-7fq9-3qv2
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Fixed In Version: Doc Type: ---
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A flaw was found in cpp-httplib. A malicious or compromised server can redirect the client to an attacker-controlled host when following cross-origin HTTP redirects. This allows the attacker to receive plaintext credentials, such as Basic Auth, Bearer Token, and Digest Auth, that were stored and forwarded in the `Authorization` header. This vulnerability leads to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2452168, 2452169, 2452170    
Bug Blocks:    

Description OSIDB Bzimport 2026-03-27 02:01:44 UTC 
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-origin HTTP redirects (301/302/307/308). A malicious or compromised server can redirect the client to an attacker-controlled host, which then receives the plaintext credentials in the `Authorization` header. Version 0.39.0 fixes the issue.