Bump urllib3 from 2.6.3 to 2.7.0

[dependabot]

Bumps urllib3 from 2.6.3 to 2.7.0.

Release notes

Sourced from urllib3's releases.

2.7.0

🚀 urllib3 is fundraising for HTTP/2 support

urllib3 is raising ~$40,000 USD to release HTTP/2 support and ensure long-term sustainable maintenance of the project after a sharp decline in financial support. If your company or organization uses Python and would benefit from HTTP/2 support in Requests, pip, cloud SDKs, and thousands of other projects please consider contributing financially to ensure HTTP/2 support is developed sustainably and maintained for the long-haul.

Thank you for your support.

Security

Addressed high-severity security issues. Impact was limited to specific use cases detailed in the accompanying advisories; overall user exposure was estimated to be marginal.

• Decompression-bomb safeguards of the streaming API were bypassed:

  1. When HTTPResponse.drain_conn() was called after the response had been read and decompressed partially. (Reported by @​Cycloctane)
  2. During the second HTTPResponse.read(amt=N) or HTTPResponse.stream(amt=N) call when the response was decompressed using the official Brotli library. (Reported by @​kimkou2024)

  See GHSA-mf9v-mfxr-j63j for details.

• HTTP pools created using ProxyManager.connection_from_url did not strip sensitive headers specified in Retry.remove_headers_on_redirect when redirecting to a different host. (GHSA-qccp-gfcp-xxvc reported by @​christos-spearbit)

Deprecations and Removals

• Used FutureWarning instead of DeprecationWarning for better visibility of existing deprecation notices. Rescheduled the removal of deprecated features to version 3.0. (urllib3/urllib3#3763)
• Removed support for end-of-life Python 3.9. (urllib3/urllib3#3720)
• Removed support for end-of-life PyPy3.10. (urllib3/urllib3#4979)
• Bumped the minimum supported pyOpenSSL version to 19.0.0. (urllib3/urllib3#3777)

Bugfixes

• Fixed a bug where HTTPResponse.read(amt=None) was ignoring decompressed data buffered from previous partial reads. (urllib3/urllib3#3636)
• Fixed a bug where HTTPResponse.read() could cache only part of the response after a partial read when cache_content=True. (urllib3/urllib3#4967)
• Fixed HTTPResponse.stream() and HTTPResponse.read_chunked() to handle amt=0. (urllib3/urllib3#3793)
• Updated _TYPE_BODY type alias to include missing Iterable[str], matching the documented and runtime behavior of chunked request bodies. (urllib3/urllib3#3798)
• Fixed LocationParseError when paths resembling schemeless URIs were passed to HTTPConnectionPool.urlopen(). (urllib3/urllib3#3352)
• Fixed BaseHTTPResponse.readinto() type annotation to accept memoryview in addition to bytearray, matching the io.RawIOBase.readinto contract and enabling use with io.BufferedReader without type errors. (urllib3/urllib3#3764)

Changelog

Sourced from urllib3's changelog.

2.7.0 (2026-05-07)

Security

Addressed high-severity security issues. Impact was limited to specific use cases detailed in the accompanying advisories; overall user exposure was estimated to be marginal.

• Decompression-bomb safeguards of the streaming API were bypassed:

  1. When HTTPResponse.drain_conn() was called after the response had been read and decompressed partially.
  2. During the second HTTPResponse.read(amt=N) or HTTPResponse.stream(amt=N) call when the response was decompressed using the official Brotli <https://pypi.org/project/brotli/>__ library.

  See GHSA-mf9v-mfxr-j63j <https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j>__ for details.

• HTTP pools created using ProxyManager.connection_from_url did not strip sensitive headers specified in Retry.remove_headers_on_redirect when redirecting to a different host. (GHSA-qccp-gfcp-xxvc <https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc>__)

Deprecations and Removals

• Used FutureWarning instead of DeprecationWarning for better visibility of existing deprecation notices. Rescheduled the removal of deprecated features to version 3.0. ([#3763](https://github.com/urllib3/urllib3/issues/3763) <https://github.com/urllib3/urllib3/issues/3763>__)
• Removed support for end-of-life Python 3.9. ([#3720](https://github.com/urllib3/urllib3/issues/3720) <https://github.com/urllib3/urllib3/issues/3720>__)
• Removed support for end-of-life PyPy3.10. ([#4979](https://github.com/urllib3/urllib3/issues/4979) <https://github.com/urllib3/urllib3/issues/4979>__)
• Bumped the minimum supported pyOpenSSL version to 19.0.0. ([#3777](https://github.com/urllib3/urllib3/issues/3777) <https://github.com/urllib3/urllib3/issues/3777>__)

Bugfixes

• Fixed a bug where HTTPResponse.read(amt=None) was ignoring decompressed data buffered from previous partial reads. ([#3636](https://github.com/urllib3/urllib3/issues/3636) <https://github.com/urllib3/urllib3/issues/3636>__)
• Fixed a bug where HTTPResponse.read() could cache only part of the response after a partial read when cache_content=True.

... (truncated)

Commits

• 9a950b9 Release 2.7.0
• 5ec0de4 Merge commit from fork
• 2bdcc44 Merge commit from fork
• f45b0df Fix a misleading example for ProxyManager (#4970)
• 577193c Switch to nightly PyPy3.11 in CI for now (#4984)
• e90af45 Avoid infinite loop in HTTPResponse.read_chunked when amt=0 (#4974)
• 67ed74f Bump dev dependencies (#4972)
• 3abd481 Upgrade mypy to version 1.20.2 (#4978)
• 2b8725d Drop support for EOL PyPy3.10 (#4979)
• 2944b2a Upgrade setup-chrome and setup-firefox to fix warnings (#4973)
• Additional commits viewable in compare view

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[amrit110]

Security Vulnerability — No Patch Available Yet

aieng-bot found the following security vulnerability reported by pip-audit, but cannot fix it automatically because no patched version has been released to PyPI yet:

Package	Version	Vulnerability	Fix Versions	Status
torch	2.12.0 (latest)	CVE-2025-3000	(none)	No fix available on PyPI

Why this cannot be auto-fixed

The vulnerability exists in torch itself. A fix requires the upstream PyTorch maintainers to release a new version. Even after bumping torch from 2.9.1 → 2.12.0 (the latest available), this CVE remains unfixed.

What was fixed automatically

The following vulnerabilities were successfully patched in this PR:

• pillow → 12.2.0 (CVE-2026-40192, CVE-2026-42308, CVE-2026-42309, CVE-2026-42310, CVE-2026-42311)
• pip → 26.1 (CVE-2026-3219, CVE-2026-6357)
• pytest → 9.0.3 (CVE-2025-71176)
• python-dotenv → 1.2.2 (CVE-2026-28684)
• transformers → 5.0.0+ (CVE-2026-1839)
• idna → 3.15+ (CVE-2026-45409)
• pymdown-extensions → 10.21.3 (CVE-2026-46338)
• torch → 2.10.0+ (CVE-2025-3001)

Recommended next steps

1. Monitor the PyTorch advisory for CVE-2025-3000 for a patch release
2. If this CVE is acceptable risk (e.g., not exploitable in this project's use of torch), consider adding CVE-2025-3000 to the ignore-vulns list in the CI workflow with appropriate justification — this requires human review and approval
3. Once a patched torch release is published to PyPI, aieng-bot can re-run and apply the update automatically

This PR will not be auto-merged until the vulnerability is resolved.

[amrit110]

Security Vulnerability — No Patch Available Yet

aieng-bot found the following security vulnerability reported by pip-audit, but cannot fix it automatically because no patched version has been released to PyPI yet:

Package	Version	Vulnerability	Status
nltk	3.9.4	PYSEC-2026-597	No fix available on PyPI

Why this cannot be auto-fixed

PYSEC-2026-597 is a path traversal vulnerability in nltk caused by an incomplete fix for a previous issue. The _UNSAFE_NO_PROTOCOL_RE regex fails to account for percent-encoded traversal sequences (e.g. ..%2f). The current PyPI latest is 3.9.4 — the vulnerable version — and no newer release is available.

A fix requires the upstream NLTK maintainers to release a new version. Once a patched release is published to PyPI, aieng-bot can re-run and apply the update automatically.

Recommended next steps

1. Monitor the PYSEC-2026-597 advisory for a patch release
2. Consider whether this vulnerability ID should be added to the ignore-vulns list in the CI workflow with justification (requires human review)
3. Monitor the NLTK GitHub issues for a fix

This PR will not be auto-merged until the vulnerability is resolved.

[amrit110]

Automated fix applied and PR merged

The agentic fix loop successfully fixed this PR and merged it.

✓ Successfully fixed merge_conflict failures - Modified 2 files - Executed 640 agent actions - (400 info, 105 tool_call, 25 error, 82 tool_result, 28 reasoning)

View detailed trace on dashboard | Raw trace

AI Engineering Maintenance Bot

[dependabot]

A newer version of urllib3 exists, but since this PR has been edited by someone other than Dependabot I haven't updated it. You'll get a PR for the updated version as normal once this PR is merged.