Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.9
Red Hat OpenShift Service Mesh 3.1.9, which is based on the open source Istio project, addresses a variety of problems in a microservice architecture by creating a centralized point of control in an application. Security Fix(es): * openshift-service-mesh/istio-proxyv2-rhel9: envoy: HTTP/2 Remote Denial of Service via HPACK compression bomb and Slowloris-style attack (CVE-2026-47774)
AI Analysis
Technical Summary
Red Hat OpenShift Service Mesh 2.6.17, based on the Istio project, fixes two HTTP/2 remote denial of service vulnerabilities in the proxyv2 component on RHEL9. These vulnerabilities (CVE-2026-47774 and CVE-2026-49975) involve HPACK compression bomb and Slowloris-style attacks that can exhaust resources and cause service disruption. The vulnerabilities do not affect confidentiality or integrity but impact availability. The advisory classifies the update as important with a high severity rating. No explicit patch version or remediation details beyond the update to 2.6.17 are provided.
Potential Impact
An attacker can remotely cause a denial of service condition in the proxyv2 component of Red Hat OpenShift Service Mesh by exploiting HTTP/2 compression bomb and Slowloris-style attacks. This results in service unavailability but does not compromise confidentiality or integrity of data.
Mitigation Recommendations
Red Hat OpenShift Service Mesh 2.6.17 includes fixes for these vulnerabilities. Users should update to version 2.6.17 as documented in the official Red Hat OpenShift Service Mesh 2.6.17 documentation. Patch status is confirmed by the vendor advisory indicating the update addresses these issues.
Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.9
Description
Red Hat OpenShift Service Mesh 3.1.9, which is based on the open source Istio project, addresses a variety of problems in a microservice architecture by creating a centralized point of control in an application. Security Fix(es): * openshift-service-mesh/istio-proxyv2-rhel9: envoy: HTTP/2 Remote Denial of Service via HPACK compression bomb and Slowloris-style attack (CVE-2026-47774)
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat OpenShift Service Mesh 2.6.17, based on the Istio project, fixes two HTTP/2 remote denial of service vulnerabilities in the proxyv2 component on RHEL9. These vulnerabilities (CVE-2026-47774 and CVE-2026-49975) involve HPACK compression bomb and Slowloris-style attacks that can exhaust resources and cause service disruption. The vulnerabilities do not affect confidentiality or integrity but impact availability. The advisory classifies the update as important with a high severity rating. No explicit patch version or remediation details beyond the update to 2.6.17 are provided.
Potential Impact
An attacker can remotely cause a denial of service condition in the proxyv2 component of Red Hat OpenShift Service Mesh by exploiting HTTP/2 compression bomb and Slowloris-style attacks. This results in service unavailability but does not compromise confidentiality or integrity of data.
Mitigation Recommendations
Red Hat OpenShift Service Mesh 2.6.17 includes fixes for these vulnerabilities. Users should update to version 2.6.17 as documented in the official Red Hat OpenShift Service Mesh 2.6.17 documentation. Patch status is confirmed by the vendor advisory indicating the update addresses these issues.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:26231
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- 3.1
Threat ID: 6a32705b0b89be68881d44da
Added to database: 06/17/2026, 10:00:59 UTC
Last enriched: 07/25/2026, 21:00:59 UTC
Last updated: 07/31/2026, 19:56:11 UTC
Views: 221
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