CVE-2026-93574: Netty's netty-codec-http component · CWE-444
Source GCVE Database
Not known to be exploited · CVSS 6.5 Medium : update Red Hat build of Keycloak 26.4 when convenient.
Data as of 6 Nov 2026, 14:04 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 6.5 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:LExploitation evidence
Disclosed: evidence found.
CVE published 18 Sep 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: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Patches and advisories
- access.redhat.com/errata/RHSA-2026:69440 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:69470 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:83612 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:95760 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:95761 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Build of Debezium 3.6netty-codec-http | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.4keycloak-rhel9-container | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.4keycloak-rhel9-operator-bundle-container | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.4keycloak-rhel9-operator-container | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.6.8netty-codec-http | Affected– | Fixed in– |
| Red Hat build of Quarkus 3.27.5.SP2netty-codec-http | Affected– | Fixed in– |
AI-suggested
A security update is available in the Red Hat build of Quarkus 3.33.3.SP2 release that addresses this vulnerability. Users should apply this official fix to remediate the issue. No additional mitigation steps are indicated in the vendor advisory.
Description
A vulnerability in Netty's netty-codec-http component allows a remote attacker to exploit improper parsing of HTTP/1.1 chunk-size tokens containing post-digit whitespace. This flaw can lead to HTTP request smuggling, enabling attackers to bypass security controls or access unauthorized resources in proxy or backend deployments. The vulnerability has a medium severity rating with a CVSS score of 6.5. A security update addressing this issue is available in the Red Hat build of Quarkus 3.33.3.SP2 release.
References
- nvd.nist.gov/vuln/detail/CVE-2026-93574 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:69440 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:69470 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:83612 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:95760 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:95761 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-93574 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2536966 (opens in a new tab)