A flaw was found in libsoup. After a CONNECT tunnel is established through an HTTP proxy, libsoup incorrectly attaches the Proxy-Authorization header to subsequent HTTPS requests sent through that tunnel to the destination server. This allows the destination server to capture proxy credentials, leading to information disclosure.
Metrics
Affected Vendors & Products
References
History
Mon, 27 Jul 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Libsoup
Libsoup libsoup |
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| Vendors & Products |
Libsoup
Libsoup libsoup |
Fri, 24 Jul 2026 23:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in libsoup. After a CONNECT tunnel is established through an HTTP proxy, libsoup incorrectly attaches the Proxy-Authorization header to subsequent HTTPS requests sent through that tunnel to the destination server. This allows the destination server to capture proxy credentials, leading to information disclosure. | |
| Title | Libsoup: libsoup: proxy credentials leak to destination server via proxy-authorization header in connect tunnels | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
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| Weaknesses | CWE-201 | |
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published: 2026-07-24T23:01:15.634Z
Updated: 2026-07-28T14:55:26.084Z
Reserved: 2026-07-24T22:32:18.748Z
Link: CVE-2026-66339
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