Bump urllib3 from 2.4.0 to 2.8.0

[dependabot]

Bumps urllib3 from 2.4.0 to 2.8.0.

Release notes

Sourced from urllib3's releases.

2.8.0

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Security

Fixed the following security issues:

• The TLS configuration for HTTPS proxies could be ignored or overridden. (High severity, GHSA-8988-9cw3-xx77)
• HTTPResponse.stream() and read_chunked() could buffer a chunk-size line of unbounded length in memory. (High severity, GHSA-vxq7-64xx-v4gw)
• Chunked Deflate streaming could enter an infinite loop. (Medium severity, GHSA-gh4c-6fx4-qh6g)

[!IMPORTANT] urllib3 2.8.0 fixes HTTPS proxy TLS configuration being ignored or overridden by destination settings. Configurations relying on that behavior may require changes.

Configure proxy CA certificates and client certificates in proxy_ssl_context, and proxy identity checks with proxy_assert_hostname or proxy_assert_fingerprint. Destination client certificates and identity overrides no longer apply to HTTPS forwarding proxy connections.

[!NOTE] CVE IDs had not yet been assigned to these advisories at the time of release due to a backlog at GitHub's CNA.

Deprecations & Removals

• Deprecated using an empty collection as the Retry option allowed_methods to retry any verb. (#5044)

Features

• Added Url.auth_decoded and Url.auth_decoded_joined convenience properties to the result of parse_url(). (#4945)
• Added basic_auth_encoding and proxy_basic_auth_encoding parameters to urllib3.util.make_headers(). (#5092)

Bugfixes

• Fixed response header handling to replace obsolete folded header lines (obs-fold) with spaces in accordance with RFC 9112, preventing raw CRLF sequences from appearing in header values such as Set-Cookie. (#1362)

• Fixed usage of proxy_ssl_context with ProxyManager when use_forwarding_for_https=True. Passing ssl_context instead of proxy_ssl_context for HTTPS proxies in this configuration now emits a FutureWarning and will raise an error in v3.0. (#2577)

• Changed behavior of the default ConnectionPool.pool initialization. LifoQueue is now resolved from the queue module after the ConnectionPool is instantiated instead of using the default cached QueueCls class property. This is done because sometimes the queue.LifoQueue is monkey-patched late in the program, such as by gevent. (#3289)

• Raised UnrewindableBodyError instead of ValueError when retrying a request whose body had tell() but not seek(). (#3779)

• Decoded percent-encoded SOCKS proxy credentials before authenticating with the proxy server. (#3785)

• Fixed HTTPResponse.drain_conn() to discard unread response data in 64 KiB chunks (same as the default amt when doing HTTPResponse.stream(...)). (#5019)

• Fixed is_ipaddress() to detect non-standard IPv4 forms accepted by socket.connect, such as hex (0x7f000001), octal (0177.0.0.1), and decimal integers (2130706433), ensuring SSL certificate verification uses the correct mode for these addresses. (#5029)

• Fixed HTTPConnectionPool.urlopen raising a misleading FullPoolError instead of ValueError when called with an invalid timeout argument on a pool created with block=True. (#5059)

• Fixed port-zero handling to preserve explicit :0 values instead of substituting the default ports 80 or 443 in URL parsing, pool selection, proxy configuration, connection_from_url(), and HTTP/2 request authority. (#5071, #5101)

• Fixed a bug where PoolManager passed the assert_hostname and assert_fingerprint parameters to HTTP connection pools. (#5077)

• Fixed HTTPConnectionPool.urlopen() and HTTP proxy forwarding to strip URL fragments from absolute request targets before sending requests. (#5079)

• Added safeguards to the proxy tunneling code to prevent potential security issues when handling invalid characters in the proxy host and HTTP headers. This change affects users of Python 3.10, Python 3.11, and Python 3.12 when the standard library does not contain the fix; those on newer Python versions should upgrade to 3.13.14+ or 3.14.5+ to get the same security fixes. (#5091)

• Fixed HTTPSConnection.connect() overriding ProxyConfig.ssl_context's certificate policy and proxy identity checks with the target connection's TLS settings when forwarding through an HTTPS proxy.

  HTTPSConnection no longer applies target SNI, assertions, or client credentials to forwarding proxy handshakes and continues to use its ssl_context as a fallback when an HTTPS proxy forwards an HTTP target. (#5093)

• Fixed URL parsing to more strictly enforce RFC 3986 host syntax, rejecting invalid host input such as raw spaces and control characters, malformed percent-encodings, and percent-encoded control characters in HTTP(S) hosts and IPv6 zone identifiers, including proxy CONNECT tunnel targets. Host normalization now also follows RFC 3986 normalization rules for percent-encoded octets by decoding percent-encoded unreserved characters and uppercasing the hexadecimal digits of retained percent-encoded octets. (#5095)

... (truncated)

Changelog

Sourced from urllib3's changelog.

2.8.0 (2026-09-15)

Security

Fixed the following security issues:

• The TLS configuration for HTTPS proxies could be ignored or overridden. (High severity, GHSA-8988-9cw3-xx77 <https://github.com/urllib3/urllib3/security/advisories/GHSA-8988-9cw3-xx77>__)
• HTTPResponse.stream() and read_chunked() could buffer a chunk-size line of unbounded length in memory. (High severity, GHSA-vxq7-64xx-v4gw <https://github.com/urllib3/urllib3/security/advisories/GHSA-vxq7-64xx-v4gw>__)
• Chunked Deflate streaming could enter an infinite loop. (Medium severity, GHSA-gh4c-6fx4-qh6g <https://github.com/urllib3/urllib3/security/advisories/GHSA-gh4c-6fx4-qh6g>__)

.. caution::

urllib3 2.8.0 fixes HTTPS proxy TLS configuration being ignored or
overridden by destination settings. Configurations relying on that
behavior may require changes.
Configure proxy CA certificates and client certificates in
proxy_ssl_context, and proxy identity checks with
proxy_assert_hostname or proxy_assert_fingerprint.
Destination client certificates and identity overrides no longer
apply to HTTPS forwarding proxy connections.

Deprecations & Removals

• Deprecated using an empty collection as the Retry option allowed_methods to retry any verb. ([#5044](https://github.com/urllib3/urllib3/issues/5044) <https://github.com/urllib3/urllib3/issues/5044>__)

Features

• Added Url.auth_decoded and Url.auth_decoded_joined convenience properties to the result of parse_url(). ([#4945](https://github.com/urllib3/urllib3/issues/4945) <https://github.com/urllib3/urllib3/issues/4945>__)
• Added basic_auth_encoding and proxy_basic_auth_encoding parameters to urllib3.util.make_headers(). ([#5092](https://github.com/urllib3/urllib3/issues/5092) <https://github.com/urllib3/urllib3/issues/5092>__)

Bugfixes

... (truncated)

Commits

• b1d30ab Release 2.8.0
• 9016d7e Skip test_read_chunked_with_trailing_data_does_not_hang for brotlicffi (#5258)
• 9101f58 Fix nox -s docs warning (#5256)
• cd770b0 Merge commit from fork
• ea2ad7b Merge commit from fork
• 0716e31 Fix loading unencrypted client keys with a password in pyOpenSSL (#5255)
• 43c68c8 Test pickling of InvalidChunkLength (#5247)
• 308b279 Share security policy between GitHub and Read the Docs (#5253)
• 53fa073 Add policy on duplicate pull requests (#5252)
• 5f2a6a8 Assert on the ALPN extension in test_tunnel_sets_http_11_alpn (#5232)
• Additional commits viewable in compare view

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Note

Medium Risk
Upgrades a core HTTP stack dependency with high-severity security fixes and a behavior change for HTTPS proxy TLS configuration that could affect proxy setups.

Overview
Updates poetry.lock to pull in urllib3 2.8.0 (from 2.4.0), including refreshed wheel hashes and urllib3’s stricter python-versions = ">=3.10" (aligned with this repo’s ^3.10 constraint).

The lockfile was regenerated with Poetry 2.5.1, which also reformats a few transitive dependency markers (e.g. fsspec / pydantic_core version constraints) without changing resolved package versions aside from urllib3. urllib3’s optional brotli and zstd extra metadata in the lockfile updates as well.

urllib3 2.8.0 brings multiple security fixes (HTTPS proxy TLS handling, chunked streaming) and stricter URL/host parsing; deployments using HTTPS forwarding proxies may need to configure proxy_ssl_context / proxy assertion options instead of relying on destination TLS settings.

^{Reviewed by Cursor Bugbot for commit 257923f. Bugbot is set up for automated code reviews on this repo. Configure here.}

[broly-code-security-scanner]

Broly Security Scan

Warning

Latest baseline snapshot is stale. Broly is running in PR-only fallback mode until the next scheduled baseline refreshes. This does not block the PR.

Note

Summary

13 actionable finding(s) in this PR

• 🟡 13 medium

Main table: 5 shown, 8 omitted of 13 actionable finding(s) above the reporting threshold. See the repository Security tab for the full set.

No finding is at or above high, so this check is not blocking. The findings above are still tracked and reported.

Severity	Scanner	Issue	Location	Dismiss	Verdict
🟡 MEDIUM	SCA	GHSA-27vj-qcqg-25rc: fsspec@2025.3.0 → >= 2026.6.0	poetry.lock:1	d5	🔺 TRUE_POSITIVE · Confidence: MEDIUM
🟡 MEDIUM	SCA	transformers@4.56.2 — 15 vulnerabilities (worst: GHSA-29pf-2h5f-8g72)	poetry.lock:1	d12	🔺 TRUE_POSITIVE · Confidence: HIGH
🟡 MEDIUM	SCA	aiohttp@3.12.15 — 64 vulnerabilities (worst: GHSA-2fqr-mr3j-6wp8)	poetry.lock:1	d1	🔺 TRUE_POSITIVE · Confidence: HIGH
🟡 MEDIUM	SCA	datasets@4.1.1 — 2 vulnerabilities (worst: GHSA-379c-qx7v-6h59) → fixed in 5.0.1	poetry.lock:1	d3	🔺 TRUE_POSITIVE · Confidence: HIGH
🟡 MEDIUM	SCA	black@25.9.0 — 3 vulnerabilities (worst: GHSA-3936-cmfr-pm3m)	poetry.lock:1	d2	🔺 TRUE_POSITIVE · Confidence: MEDIUM

Dismiss false positives

Tick a box to dismiss the finding; untick it to bring the finding back. That is the same as replying /broly dismiss d1 and /broly undismiss d1. To record why it is a false positive, reply with /broly dismiss d1: your reason instead — Broly reuses those reasons to triage similar findings across the org.

• d1 · 🟡 MEDIUM   · poetry.lock:1 · aiohttp@3.12.15 — 64 vulnerabilities (worst: GHSA-2fqr-mr3j-6wp8)
• d2 · 🟡 MEDIUM   · poetry.lock:1 · black@25.9.0 — 3 vulnerabilities (worst: GHSA-3936-cmfr-pm3m)
• d3 · 🟡 MEDIUM   · poetry.lock:1 · datasets@4.1.1 — 2 vulnerabilities (worst: GHSA-379c-qx7v-6h59)
• d4 · 🟡 MEDIUM   · poetry.lock:1 · filelock@3.19.1 — 4 vulnerabilities (worst: GHSA-qmgc-5h2g-mvrw)
• d5 · 🟡 MEDIUM   · poetry.lock:1 · GHSA-27vj-qcqg-25rc: fsspec@2025.3.0
• d6 · 🟡 MEDIUM   · poetry.lock:1 · idna@3.10 — 2 vulnerabilities (worst: GHSA-65pc-fj4g-8rjx)
• d7 · 🟡 MEDIUM   · poetry.lock:1 · pillow@11.3.0 — 36 vulnerabilities (worst: GHSA-45hq-cxwh-f6vc)
• d8 · 🟡 MEDIUM   · poetry.lock:1 · pyarrow@21.0.0 — 2 vulnerabilities (worst: GHSA-rgxp-2hwp-jwgg)
• d9 · 🟡 MEDIUM   · poetry.lock:1 · pygments@2.19.1 — 2 vulnerabilities (worst: GHSA-5239-wwwm-4pmq)
• d10 · 🟡 MEDIUM   · poetry.lock:1 · pytest@8.4.2 — 2 vulnerabilities (worst: GHSA-6w46-j5rx-g56g)
• d11 · 🟡 MEDIUM   · poetry.lock:1 · requests@2.32.5 — 2 vulnerabilities (worst: GHSA-gc5v-m9x4-r6x2)
• d12 · 🟡 MEDIUM   · poetry.lock:1 · transformers@4.56.2 — 15 vulnerabilities (worst: GHSA-29pf-2h5f-8g72)
• d13 · 🟡 MEDIUM   · poetry.lock:1 · virtualenv@20.34.0 — 10 vulnerabilities (worst: GHSA-597g-3phw-6986)

Note

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