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Brotli Vulnerability — Ubuntu Security Update (USN-8956-1)

It was discovered that Brotli incorrectly handled certain compressed streams. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code.

Critical 9.2 CVSS
Ubuntu 20.04 Ubuntu 22.04
  1. Ubuntu Security Notices

  2. USN-8956-1


Publication date

26 October 2026

Overview

Brotli could be made to crash or run programs if it received specially
crafted input.

Releases


26.10


26.04 LTS


24.04 LTS


22.04 LTS


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Packages

  • brotli – lossless compression algorithm and format (command line utility)

Details

It was discovered that Brotli incorrectly handled certain compressed
streams. A remote attacker could possibly use this issue to cause a
denial of service or execute arbitrary code.

It was discovered that Brotli incorrectly handled certain compressed
streams. A remote attacker could possibly use this issue to cause a
denial of service or execute arbitrary code.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.10

stonking

brotli – 

1.2.0-4ubuntu0.1

libbrotli1 – 

1.2.0-4ubuntu0.1

python3-brotli – 

1.2.0-4ubuntu0.1

26.04

LTS resolute

brotli – 

1.2.0-3ubuntu0.1

libbrotli1 – 

1.2.0-3ubuntu0.1

python3-brotli – 

1.2.0-3ubuntu0.1

24.04

LTS noble

brotli – 

1.1.0-2ubuntu0.1

libbrotli1 – 

1.1.0-2ubuntu0.1

python3-brotli – 

1.1.0-2ubuntu0.1

22.04

LTS jammy

brotli – 

1.0.9-2ubuntu0.1

libbrotli1 – 

1.0.9-2ubuntu0.1

python3-brotli – 

1.0.9-2ubuntu0.1


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References

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