Sourced from scrapy's releases.

2.13.4

Fix for the CVE-2025-6176 security issue: improved protection against decompression bombs in HttpCompressionMiddleware for responses compressed using the br and deflate methods. Requires brotli >= 1.2.0.

Full changelog

2.13.3

• Changed the values for DOWNLOAD_DELAY (from 0 to 1) and CONCURRENT_REQUESTS_PER_DOMAIN (from 8 to 1) in the default project template.
• Fixed several bugs in the engine initialization and exception handling logic.
• Allowed running tests with Twisted 25.5.0+ again and fixed test failures with lxml 6.0.0.

See the full changelog

2.13.2

• Fixed a bug introduced in Scrapy 2.13.0 that caused results of request errbacks to be ignored when the errback was called because of a downloader error.
• Docs and error messages improvements related to the Scrapy 2.13.0 default reactor change.

See the full changelog

2.13.1

• Give callback requests precedence over start requests when priority values are the same.

See the full changelog

2.13.0

• The asyncio reactor is now enabled by default
• Replaced start_requests() (sync) with start() (async) and changed how it is iterated.
• Added the allow_offsite request meta key
• Spider middlewares that don't support asynchronous spider output are deprecated
• Added a base class for universal spider middlewares

See the full changelog

2.12.0

• Dropped support for Python 3.8, added support for Python 3.13
• start_requests can now yield items
• Added scrapy.http.JsonResponse
• Added the CLOSESPIDER_PAGECOUNT_NO_ITEM setting

See the full changelog.

2.11.2

Mostly bug fixes, including security bug fixes.

See the full changelog.

2.11.1

• Security bug fixes.
• Support for Twisted >= 23.8.0.
• Documentation improvements.

... (truncated)

Sourced from scrapy's changelog.

Scrapy 2.13.4 (2025-11-17)

Security bug fixes

-   Improved protection against decompression bombs in
    :class:`~scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware`
    for responses compressed using the ``br`` and ``deflate`` methods: if a
    single compressed chunk would be larger than the response size limit (see
    :setting:`DOWNLOAD_MAXSIZE`) when decompressed, decompression is no longer
    carried out. This is especially important for the ``br`` (Brotli) method
    that can provide a very high compression ratio. Please, see the
    `CVE-2025-6176`_ and `GHSA-2qfp-q593-8484`_ security advisories for more
    information.
    (:issue:`7134`)
.. _CVE-2025-6176: https://nvd.nist.gov/vuln/detail/CVE-2025-6176
.. _GHSA-2qfp-q593-8484: https://github.com/advisories/GHSA-2qfp-q593-8484

Modified requirements

• The minimum supported version of the optional brotli package is now 1.2.0. (:issue:7134)

• The brotlicffi and brotlipy packages can no longer be used to decompress Brotli-compressed responses. Please install the brotli package instead. (:issue:7134)

Other changes

-   Restricted the maximum supported Twisted version to ``25.5.0``, as Scrapy
    currently uses some private APIs changed in later Twisted versions.
    (:issue:`7142`)


Stopped setting the COVERAGE_CORE environment variable in tests, it

didn't have an effect but caused the coverage module to produce a

warning or an error.

(:issue:7137)


Removed the documentation build dependency on the deprecated

sphinx-hoverxref module.

(:issue:6786, :issue:6922)


.. _release-2.13.3:
</tr></table>

... (truncated)

• 2f62ab5 Bump version: 2.13.3 → 2.13.4
• 31a9c03 Release notes for 2.13.4. (#7144)
• c44b8df Cherry-pick: Mitigate brotli and deflate decompression bombs DoS (#7134)
• d091256 Remove the deprecated sphinx-hoverxref (#6922)
• c83ca70 Don't force the unavailable sysmon coverage core. (#7137)
• 85e4e6c Pin Twisted to <= 25.5.0 due to internal API changes.
• 155a504 Bump version: 2.13.2 → 2.13.3
• cf465bf Release notes for 2.13.3. (#6934)
• c9cdf0a Narrow down TestEngine::test_short_timeout() expectations. (#6911)
• 03fe7a6 Add a deprecation notice for the offsite spider middleware.
• Additional commits viewable in compare view

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