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We've just been alerted that this update fixes a security vulnerability:
Sourced from The GitHub Security Advisory Database.
Uncontrolled Resource Consumption in urllib3
The _encode_invalid_chars function in util/url.py in the urllib3 library 1.25.2 through 1.25.7 for Python allows a denial of service (CPU consumption) because of an inefficient algorithm. The percent_encodings array contains all matches of percent encodings. It is not deduplicated. For a URL of length N, the size of percent_encodings may be up to O(N). The next step (normalize existing percent-encoded bytes) also takes up to O(N) for each step, so the total time is O(N^2). If percent_encodings were deduplicated, the time to compute _encode_invalid_chars would be O(kN), where k is at most 484 ((10+6*2)^2).
Affected versions: [">= 1.25.2, <= 1.25.7"]
Bumps urllib3 from 1.25.6 to 1.26.4.
Release notes
Sourced from urllib3's releases.
... (truncated)
Changelog
Sourced from urllib3's changelog.
... (truncated)
Commits
a891304
Release 1.26.48d65ea1
Merge pull request from GHSA-5phf-pp7p-vc2r5e34326
Add proper stacklevel to method_allowlist warning361f1e2
Release 1.26.33179dfd
Allow using deprecated OpenSSL with CRYPTOGRAPHY_ALLOW_OPENSSL_102d97e5d4
Use Python 3.5 compatible get-pipcb5e2fc
[1.26] Don't compare bytes and str in putheader()b89158f
[1.26] Update RECENT_DATE to 2020-07-01a800c74
[1.26] Recommend GitHub Sponsors instead of Open Collective947284e
[1.26] Improve message for ProxySchemeUnknown exceptionDependabot 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
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