Catastrophic backtracking in URL authority parser when passed URL containing many @ characters
Impact
When provided with a URL containing many @ characters in the authority component the authority regular expression exhibits catastrophic backtracking causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.
Added support for HTTPS proxies contacting HTTPS servers (Pull #1923, Pull #1806)
Deprecated negotiating TLSv1 and TLSv1.1 by default. Users that
still wish to use TLS earlier than 1.2 without a deprecation warning
should opt-in explicitly by setting ssl_version=ssl.PROTOCOL_TLSv1_1 (Pull #2002)
Starting in urllib3 v2.0: Connections that receive a DeprecationWarning will fail
Deprecated Retry options Retry.DEFAULT_METHOD_WHITELIST, Retry.DEFAULT_REDIRECT_HEADERS_BLACKLIST
and Retry(method_whitelist=...) in favor of Retry.DEFAULT_ALLOWED_METHODS,
Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT, and Retry(allowed_methods=...)
(Pull #2000) Starting in urllib3 v2.0: Deprecated options will be removed
Added support for HTTPS proxies contacting HTTPS servers (Pull #1923, Pull #1806)
Deprecated negotiating TLSv1 and TLSv1.1 by default. Users that still wish to use TLS earlier than 1.2 without a deprecation warning should opt-in explicitly by setting ssl_version=ssl.PROTOCOL_TLSv1_1 (Pull #2002) Starting in urllib3 v2.0: Connections that receive a DeprecationWarning will fail
Deprecated Retry options Retry.DEFAULT_METHOD_WHITELIST, Retry.DEFAULT_REDIRECT_HEADERS_BLACKLIST and Retry(method_whitelist=...) in favor of Retry.DEFAULT_ALLOWED_METHODS, Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT, and Retry(allowed_methods=...) (Pull #2000) Starting in urllib3 v2.0: Deprecated options will be removed
Added default User-Agent header to every request (Pull #1750)
Added urllib3.util.SKIP_HEADER for skipping User-Agent, Accept-Encoding, and Host headers from being automatically emitted with requests (Pull #2018)
Collapse transfer-encoding: chunked request data and framing into the same socket.send() call (Pull #1906)
Send http/1.1 ALPN identifier with every TLS handshake by default (Pull #1894)
Properly terminate SecureTransport connections when CA verification fails (Pull #1977)
Don't emit an SNIMissingWarning when passing server_hostname=None to SecureTransport (Pull #1903)
Disabled requesting TLSv1.2 session tickets as they weren't being used by urllib3 (Pull #1970)
Suppress BrokenPipeError when writing request body after the server has closed the socket (Pull #1524)
Wrap ssl.SSLError that can be raised from reading a socket (e.g. "bad MAC") into an urllib3.exceptions.SSLError (Pull #1939)
1.25.11 (2020-10-19)
Fix retry backoff time parsed from Retry-After header when given in the HTTP date format. The HTTP date was parsed as the local timezone rather than accounting for the timezone in the HTTP date (typically UTC) (Pull #1932, Pull #1935, Pull #1938, Pull #1949)
Fix issue where an error would be raised when the SSLKEYLOGFILE environment variable was set to the empty string. Now SSLContext.keylog_file is not set in this situation (Pull #2016)
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Bumps urllib3 from 1.25.10 to 1.26.5. This update includes a security fix.
Vulnerabilities fixed
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Commits
d161647Release 1.26.52d4a3feImprove performance of sub-authority splitting in URL2698537Update vendored six to 1.16.007bed79Fix deprecation warnings for Python 3.10 ssl moduled725a9bAdd Python 3.10 to GitHub Actions339ad34Use pytest==6.2.4 on Python 3.10+f271c9cApply latest Black formatting1884878[1.26] Properly proxy EOF on the SSLTransport test suitea891304Release 1.26.48d65ea1Merge pull request from GHSA-5phf-pp7p-vc2rDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase.Dependabot commands and options
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