Metrics
Affected Vendors & Products
Tue, 18 Aug 2026 19:30:00 +0000
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ssvc
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Tue, 18 Aug 2026 18:30:00 +0000
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Tue, 18 Aug 2026 18:15:00 +0000
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Tue, 18 Aug 2026 17:45:00 +0000
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Python
Python cpython |
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| Vendors & Products |
Python
Python cpython |
Tue, 18 Aug 2026 16:00:00 +0000
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| Description | The HTTPPasswordMgr class in the urllib.request module, along with its subclasses HTTPPasswordMgrWithDefaultRealm and HTTPPasswordMgrWithPriorAuth, did not take the URL scheme into account when matching stored credentials against a requested URL. Credentials added for an https:// URL were also used for requests to the same host over http://, so an attacker able to redirect or downgrade a client to plain HTTP (for example, via an HTTPS-to-HTTP redirect or an on-path position) could capture credentials in cleartext. Credentials added for http:// URLs could likewise be sent over https://. Credential matching is now scoped by URL scheme. Credentials registered with a URL that includes a scheme are only used for requests with the same scheme. Credentials registered with a bare authority (such as example.com or example.com:8080) continue to match any scheme, preserving compatibility with existing code, including proxy authentication. Users who cannot upgrade immediately can mitigate by ensuring that applications never make plain http:// requests to hosts for which credentials are registered, for example by not following redirects to http:// URLs. | |
| Title | `HTTPPasswordMgr` can send saved HTTPS credentials via HTTP because of incorrect scheme matching | |
| Weaknesses | CWE-319 CWE-522 |
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| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: PSF
Published:
Updated: 2026-08-18T18:56:57.585Z
Reserved: 2026-07-15T08:49:13.390Z
Link: CVE-2026-15806
Updated: 2026-08-18T18:07:31.778Z
Status : Received
Published: 2026-08-18T16:17:02.220
Modified: 2026-08-18T19:16:44.547
Link: CVE-2026-15806
No data.
OpenCVE Enrichment
Updated: 2026-08-18T17:30:15Z