Red Hat Security Advisory: Red Hat build of Quarkus 3.27.6.SP2 release and security update
Affects Red HatSource GCVE Database
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
Thin evidence
One scorer or none| CNA (Google) | CVSS 4.0 | 9.2 |
|---|
- 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:NExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 22 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 5 days after disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by Google LLC
, 6 days before disclosure
CVE published
on cve.org
, t = 0
In Threat Radar
record ingested
, 4 days after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed
, 5 days after disclosure
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
| Product | Affected | Fixed in |
|---|---|---|
| Brotligithub.com/google/brotli | Affected
| Fixed in
|
| Brotligithub.com/google/brotli | Affected
| Fixed in
|
| Brotligithub.com/google/brotli | Affected
| Fixed in
|
GitHubgithub.com/google/brotlipkg:github/github.com/google/brotliOther threats | Affected
| Fixed in
|
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
- access.redhat.com/errata/RHSA-2026:93908 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- access.redhat.com/products/quarkus/ (opens in a new tab)
- access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=redhat.quarkus&downloadType=distributions&version=3.27.6.SP2 (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_build_of_quarkus/3.27 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_93908.json (opens in a new tab)