USN-8956-1: Brotli vulnerability

Published Oct 26, 2026
·
Updated

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.

Affected Software

29 affected componentsFixes available
Google Brotli
All of the following
ubuntu/brotli<1.2.0-4ubuntu0.1
1.2.0-4ubuntu0.1
Ubuntu Ubuntu=26.10
All of the following
ubuntu/libbrotli1<1.2.0-4ubuntu0.1
1.2.0-4ubuntu0.1
Ubuntu Ubuntu=26.10
All of the following
ubuntu/python3-brotli<1.2.0-4ubuntu0.1
1.2.0-4ubuntu0.1
Ubuntu Ubuntu=26.10
All of the following
ubuntu/brotli<1.2.0-3ubuntu0.1
1.2.0-3ubuntu0.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/libbrotli1<1.2.0-3ubuntu0.1
1.2.0-3ubuntu0.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/python3-brotli<1.2.0-3ubuntu0.1
1.2.0-3ubuntu0.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/brotli<1.1.0-2ubuntu0.1
1.1.0-2ubuntu0.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/libbrotli1<1.1.0-2ubuntu0.1
1.1.0-2ubuntu0.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/python3-brotli<1.1.0-2ubuntu0.1
1.1.0-2ubuntu0.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/brotli<1.0.9-2ubuntu0.1
1.0.9-2ubuntu0.1
Ubuntu Ubuntu=22.04
All of the following
ubuntu/libbrotli1<1.0.9-2ubuntu0.1
1.0.9-2ubuntu0.1
Ubuntu Ubuntu=22.04
All of the following
ubuntu/python3-brotli<1.0.9-2ubuntu0.1
1.0.9-2ubuntu0.1
Ubuntu Ubuntu=22.04
ubuntu/brotli<1.0.9-2ubuntu0.1
1.0.9-2ubuntu0.1
ubuntu/brotli<1.1.0-2ubuntu0.1
1.1.0-2ubuntu0.1
ubuntu/brotli<1.2.0-4ubuntu0.1
1.2.0-4ubuntu0.1
ubuntu/brotli<1.2.0-3ubuntu0.1
1.2.0-3ubuntu0.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/brotli to a version that resolves this vulnerability.

    Fixed in 1.2.0-4ubuntu0.1
  2. Upgrade

    Upgrade ubuntu/libbrotli1 to a version that resolves this vulnerability.

    Fixed in 1.2.0-4ubuntu0.1
  3. Upgrade

    Upgrade ubuntu/python3-brotli to a version that resolves this vulnerability.

    Fixed in 1.2.0-4ubuntu0.1
  4. Upgrade

    Upgrade ubuntu/brotli to a version that resolves this vulnerability.

    Fixed in 1.2.0-3ubuntu0.1
  5. Upgrade

    Upgrade ubuntu/libbrotli1 to a version that resolves this vulnerability.

    Fixed in 1.2.0-3ubuntu0.1
  6. Upgrade

    Upgrade ubuntu/python3-brotli to a version that resolves this vulnerability.

    Fixed in 1.2.0-3ubuntu0.1
  7. Upgrade

    Upgrade ubuntu/brotli to a version that resolves this vulnerability.

    Fixed in 1.1.0-2ubuntu0.1
  8. Upgrade

    Upgrade ubuntu/libbrotli1 to a version that resolves this vulnerability.

    Fixed in 1.1.0-2ubuntu0.1
  9. Upgrade

    Upgrade ubuntu/python3-brotli to a version that resolves this vulnerability.

    Fixed in 1.1.0-2ubuntu0.1
  10. Upgrade

    Upgrade ubuntu/brotli to a version that resolves this vulnerability.

    Fixed in 1.0.9-2ubuntu0.1
  11. Upgrade

    Upgrade ubuntu/libbrotli1 to a version that resolves this vulnerability.

    Fixed in 1.0.9-2ubuntu0.1
  12. Upgrade

    Upgrade ubuntu/python3-brotli to a version that resolves this vulnerability.

    Fixed in 1.0.9-2ubuntu0.1

Event History

Oct 26, 2026
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software
Advisory Published
via OSV·03:54 PM
Data Sourced
via OSV·03:54 PM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

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