Update dependency brotli to v1.2.0 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
brotli	==1.0.9 → ==1.2.0

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Scrapy is vulnerable to a denial of service (DoS) attack due to flaws in brotli decompression implementation

CVE-2025-6176 / GHSA-2qfp-q593-8484

More information

Details

Scrapy versions up to 2.13.3 are vulnerable to a denial of service (DoS) attack due to a flaw in its brotli decompression implementation. The protection mechanism against decompression bombs fails to mitigate the brotli variant, allowing remote servers to crash clients with less than 80GB of available memory. This occurs because brotli can achieve extremely high compression ratios for zero-filled data, leading to excessive memory consumption during decompression. Mitigation for this vulnerability needs security enhancement added in brotli v1.2.0.

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

• https://nvd.nist.gov/vuln/detail/CVE-2025-6176
• https://huntr.com/bounties/2c26a886-5984-47ee-a421-0d5fe1344eb0
• https://github.com/google/brotli/pull/1234
• https://github.com/google/brotli/commit/67d78bc41db1a0d03f2e763497748f2f69946627
• https://github.com/google/brotli/releases/tag/v1.2.0
• https://github.com/google/brotli/issues/1375
• https://github.com/scrapy/scrapy/pull/7134
• https://github.com/google/brotli/issues/1327
• https://github.com/scrapy/scrapy/commit/14737e91edc513967f516fc839cc9c8a4f8d91da
• https://github.com/advisories/GHSA-2qfp-q593-8484

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

google/brotli (brotli)

v1.2.0

Compare Source

SECURITY

• python: added Decompressor::can_accept_more_data method and optional
  output_buffer_limit argument Decompressor::process;
  that allows mitigation of unexpectedly large output;
  reported by Charles Chan (https://github.com/charleswhchan)

Added

• decoder / encoder: added static initialization to reduce binary size
• python: allow limiting decoder output (see SECURITY section)
• CLI: brcat alias; allow decoding concatenated brotli streams
• kt: pure Kotlin decoder
• cgo: support "raw" dictionaries
• build: Bazel modules

Removed

• java: dropped finalize() for native entities

Fixed

• java: in compress pass correct length to native encoder

Improved

• build: install man pages
• build: updated / fixed / refined Bazel buildfiles
• encoder: faster encoding
• cgo: link via pkg-config
• python: modernize extension / allow multi-phase module initialization

Changed

• decoder / encoder: static tables use "small" model (allows 2GiB+ binaries)

v1.1.0

Compare Source

Added

• decoder: BrotliDecoderAttachDictionary
• decoder: BrotliDecoderOnFinish callback behind BROTLI_REPORTING
• decoder: BrotliDecoderSetMetadataCallbacks
• encoder: BrotliEncoderPrepareDictionary,
  BrotliEncoderDestroyPreparedDictionary,
  BrotliEncoderAttachPreparedDictionary
• decoder: BrotliEncoderOnFinish callback behind BROTLI_REPORTING
• common: BrotliSharedDictionaryCreateInstance,
  BrotliSharedDictionaryDestroyInstance,
  BrotliSharedDictionaryAttach
• CLI: --dictionary option
• java: encoder wrapper: Parameters.mode
• java: Brotli{Input|Output}Stream.attachDictionary
• java: wrapper: partial byte array input
• typescript: decoder (transpiled from Java)

Removed

• build: BROTLI_BUILD_PORTABLE option

Fixed

• java: JNI decoder failed sometimes on power of 2 payloads

Improved

• java / js: smaller decoder footprint
• decoder: faster decoding
• encoder: faster encoding
• encoder: smaller stack frames

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