Red Hat Security Advisory: Red Hat Developer Hub 2.1.0 release
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 13 Nov 2026, 14:22 UTC
Sources agree
| CNA (Google) | CVSS 4.0 | 9.2 |
|---|---|---|
| CNA | CVSS 4.0 | 9.2 |
| NVD | CVSS 3.1 | 9.8 |
- 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: evidence found.
1 exposed host found; no attack traffic recorded
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), OffSeq Mirage (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 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 Developer Hub 2.1.0 includes fixes for this vulnerability. Users should update to this version or apply the relevant patches provided by Red Hat. For Node.js and .NET packages, update the system Brotli or bundled Brotli libraries as appropriate. Red Hat's security bulletin RHSA-2026:96391 provides detailed mitigation procedures. Red Hat platform hardenings such as ASLR, NX, FORTIFY_SOURCE, and SELinux help mitigate exploitation risk. No additional generic mitigations are recommended beyond applying the official fixes.
Description
CVE-2026-111497 is a security vulnerability in the Google Brotli decoder used by Red Hat Developer Hub and other Red Hat products. It involves an out-of-bounds write triggered by a crafted Brotli-compressed stream, which can lead to memory disclosure, denial of service, or potentially arbitrary code execution when decompressing untrusted Brotli data. Red Hat rates this flaw as Important with high attack complexity due to required conditions and platform hardenings. The vulnerability affects decompression of malformed Brotli streams rather than typical well-formed data. Red Hat Developer Hub 2.1.0 includes fixes addressing this issue.
References
- access.redhat.com/errata/RHSA-2026:96391 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-111497 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-111943 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-114406 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- catalog.redhat.com/search?gs&searchType=containers&q=rhdh (opens in a new tab)
- developers.redhat.com/rhdh/overview (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_developer_hub (opens in a new tab)
- redhat.atlassian.net/browse/RHIDP-13854 (opens in a new tab)
- redhat.atlassian.net/browse/RHIDP-13855 (opens in a new tab)
- redhat.atlassian.net/browse/RHIDP-18352 (opens in a new tab)
- redhat.atlassian.net/browse/RHIDP-18561 (opens in a new tab)
- redhat.atlassian.net/browse/RHIDP-18756 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_96391.json (opens in a new tab)