Advisoriesby IbisRed HatCVE-2026-93492
Red Hat Netty: denial of service
No fix yet
A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS).
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Build of Debezium 3.6 Product | all versions | No fix yet |
| Red Hat JBoss Enterprise Application Platform 8.1 Product | all versions | No fix yet |
| Red Hat build of Keycloak 26.4.17 Product | all versions | No fix yet |
| Red Hat build of Keycloak 26.6.8 Product | all versions | No fix yet |
| Red Hat build of Quarkus 3.27.5.SP2 Product | all versions | No fix yet |
| Red Hat build of Quarkus 3.33.3.SP2 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-1035
- www.cve.org/CVERecord?id=CVE-2026-93492
- nvd.nist.gov/vuln/detail/CVE-2026-93492
- access.redhat.com/errata/RHSA-2026:69440
- access.redhat.com/errata/RHSA-2026:69470
- access.redhat.com/errata/RHSA-2026:83612
- access.redhat.com/errata/RHSA-2026:95221
- access.redhat.com/errata/RHSA-2026:95759
- access.redhat.com/errata/RHSA-2026:95760
- access.redhat.com/errata/RHSA-2026:95761
- access.redhat.com/errata/RHSA-2026:95762
- access.redhat.com/security/cve/CVE-2026-93492
- bugzilla.redhat.com/show_bug.cgi?id=2536895