Skip to main content
CVE-2026-111497VulnerabilityPublished

Red Hat Security Advisory: Red Hat build of Quarkus 3.27.6.SP2 release and security update

Affects Red HatSource GCVE Database

0
Compare
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, 20:17 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

Red Hat has released an official update in Quarkus version 3.27.6.SP2 that addresses this vulnerability. Users should apply this update promptly after ensuring all previously released relevant errata have been installed. Detailed update instructions are available from Red Hat's official documentation. No additional mitigation steps are indicated by the vendor.

Description

Red Hat has released a security update for its build of Quarkus version 3.27.6.SP2 addressing a high-severity vulnerability identified as CVE-2026-111497. The vulnerability is an out-of-bounds write in the Google Brotli Decoder component on native-linux-x86_64 platforms. This update is rated as important by Red Hat Product Security and includes the fix for this issue. Users are advised to apply this update after ensuring all previous errata are applied.

References

Community reviews

Loading reviews…