CVE-2026-15806

01/תיאור (מקור, אנגלית)

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.

02/קישורים10

• github.com/python/cpython/commit/641be42bb07921ba0f8bffe228b1d‮…
• github.com/python/cpython/commit/851cf9a7142ecbdd39f831055533f‮…
• github.com/python/cpython/commit/95355ee3a8e1d3c3d4858d1973aa4‮…
• github.com/python/cpython/commit/a0d023fbd23773e24b35d83687894‮…
• github.com/python/cpython/commit/a2773a34183b7d94a243bb98fd658‮…
• github.com/python/cpython/commit/a7bb524fef61f77ede01f660ffbd5‮…
• github.com/python/cpython/commit/dac88d8615078c55f1304ea4c7a2d‮…
• github.com/python/cpython/issues/155694
• github.com/python/cpython/pull/155696
• mail.python.org/archives/list/[email protected]/thr‮…