CVE-2026-33745

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Source
https://cve.org/CVERecord?id=CVE-2026-33745
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33745.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33745
Aliases
  • GHSA-6hrp-7fq9-3qv2
Downstream
Related
Published
2026-03-27T00:46:48.941Z
Modified
2026-04-19T10:44:15.198423506Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
cpp-httplib Client Leaks Authentication Credentials to Untrusted Hosts on Cross-Origin HTTP Redirect
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-200"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33745.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/yhirose/cpp-httplib

Affected ranges

Type
GIT
Repo
https://github.com/yhirose/cpp-httplib
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a77284a634bb0532ea197f50777fa3e830095dfd
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.39.0"
        }
    ]
}

Affected versions

Other
latest
v0.*
v0.10.0
v0.10.1
v0.10.2
v0.10.3
v0.10.4
v0.10.5
v0.10.6
v0.10.7
v0.10.8
v0.10.9
v0.11.0
v0.11.1
v0.11.2
v0.11.3
v0.11.4
v0.12.0
v0.12.1
v0.12.2
v0.12.3
v0.12.4
v0.12.5
v0.12.6
v0.13.0
v0.13.1
v0.13.2
v0.13.3
v0.14.0
v0.14.1
v0.14.2
v0.14.3
v0.15.0
v0.15.1
v0.15.2
v0.15.3
v0.16.0
v0.16.1
v0.16.2
v0.16.3
v0.17.0
v0.17.1
v0.17.2
v0.17.3
v0.18.0
v0.18.1
v0.18.2
v0.18.3
v0.18.4
v0.18.5
v0.18.6
v0.18.7
v0.19.0
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.2.6
v0.20.0
v0.20.1
v0.21.0
v0.22.0
v0.23.0
v0.23.1
v0.24.0
v0.25.0
v0.26.0
v0.27.0
v0.28.0
v0.29.0
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.30.0
v0.30.1
v0.30.2
v0.31.0
v0.32.0
v0.33.0
v0.33.1
v0.34.0
v0.35.0
v0.37.0
v0.37.1
v0.37.2
v0.38.0
v0.4.0
v0.4.1
v0.4.2
v0.5.0
v0.5.1
v0.5.10
v0.5.11
v0.5.12
v0.5.13
v0.5.2
v0.5.3
v0.5.4
v0.5.5
v0.5.6
v0.5.7
v0.5.8
v0.5.9
v0.6.0
v0.6.1
v0.6.2
v0.6.3
v0.6.4
v0.6.5
v0.6.6
v0.6.7
v0.7.0
v0.7.1
v0.7.10
v0.7.11
v0.7.12
v0.7.13
v0.7.14
v0.7.15
v0.7.16
v0.7.17
v0.7.18
v0.7.2
v0.7.3
v0.7.4
v0.7.5
v0.7.6
v0.7.7
v0.7.8
v0.7.9
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.8.5
v0.8.6
v0.8.7
v0.8.8
v0.8.9
v0.9.0
v0.9.1
v0.9.10
v0.9.2
v0.9.3
v0.9.4
v0.9.5
v0.9.6
v0.9.7
v0.9.8
v0.9.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33745.json"