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CVE-2026-111497VulnerabilityPublished

Red Hat Security Advisory: Red Hat build of Quarkus 3.33.4.SP2 release and security update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-111497· Critical 9.2

Exploited in the wild · KEV due 10 Nov 2026 · fixed in Red Hat package updates : patch Red Hat github.com/google/brotli now.

Data as of 2 Nov 2026, 20:18 UTC

CVSS 4.0 base score
9.2Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Google)CVSS 4.09.2
KEV deadline
 US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
Patch
Available – fixed in 1.2.1, 1.1.1, 1.0.10
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 22 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: evidence found.

    Listed in CISA KEV 5 days after disclosure

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by Google LLC

    , 6 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. In Threat Radar

    record ingested

    , 4 days after disclosure

  4. , 5 days after disclosure

  5. KEV remediation due

    US federal deadline

    , 19 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.

What to do

Upgrade Brotli and github.com/google/brotli to 1.2.1, 1.1.1 or 1.0.10.

Affected software

ProductAffectedFixed in
Brotligithub.com/google/brotliAffected
  • >=1.2.0 <1.2.1
Fixed in
  • 1.2.1
Brotligithub.com/google/brotliAffected
  • >=1.1.0 <1.1.1
Fixed in
  • 1.1.1
Brotligithub.com/google/brotliAffected
  • >=1.0.3 <1.0.10
Fixed in
  • 1.0.10
GitHubgithub.com/google/brotlipkg:github/github.com/google/brotliOther threatsAffected
  • >=1.0.3 <1.0.10
  • >=1.1.0 <1.1.1
  • >=1.2.0 <1.2.1
Fixed in
  • 1.0.10
  • 1.1.1
  • 1.2.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Apply the Red Hat build of Quarkus 3.33.4.SP2 update which includes the fix for CVE-2026-111497. Ensure that all previously released errata relevant to your system are applied before updating. Follow Red Hat's official guidance on applying updates as detailed in their knowledge base article https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the update.

Description

Red Hat has released an important security update for its build of Quarkus version 3.33.4.SP2 addressing a major incident vulnerability (CVE-2026-111497). The flaw is an out-of-bounds write in the Google Brotli decoder component on native Linux x86_64 platforms. This vulnerability could potentially lead to memory corruption issues. The update is part of the Quarkus 3.33.4.SP2 release and is recommended to be applied after ensuring all previous errata are installed.

References

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