Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.6
Red Hat OpenShift Service Mesh 3.1.6, 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. Fixes/Improvements: * Multiple InferencePools on same Gateway - ext_proc lost for all but first (OSSM-12585) Security Fix(es): * istio-rhel9-operator: Unexpected session resumption in crypto/tls (CVE-2025-68121) * istio-cni-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121) * istio-pilot-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121) * istio-proxyv2-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121) * istio-rhel9-operator: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732) * istio-cni-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732) * istio-pilot-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732) * istio-proxyv2-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732) * istio-rhel9-operator: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731) * istio-cni-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731) * istio-pilot-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731) * istio-proxyv2-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731) * istio-rhel9-operator: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * istio-cni-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * istio-pilot-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * istio-proxyv2-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * istio-rhel9-operator: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * istio-cni-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * istio-pilot-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * istio-proxyv2-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * istio-pilot-rhel9: JWKS Resolver Failure May Expose Hardcoded Default Keys (CVE-2026-31837) * istio-proxyv2-rhel9: JWKS Resolver Failure May Expose Hardcoded Default Keys (CVE-2026-31837)
AI Analysis
Technical Summary
Red Hat OpenShift Service Mesh 3.1.6, based on the Istio project, includes fixes for several security vulnerabilities. Notably, CVE-2025-61726 is a denial of service vulnerability in the Go standard library's net/url package, where no limit is enforced on the number of unique query parameters parsed. An attacker can exploit this by sending a crafted HTTP request with many unique query parameters, causing excessive memory use and application crash or unresponsiveness. Additional fixes address unexpected session resumption in crypto/tls (CVE-2025-68121), code smuggling via doc comments (CVE-2025-61732), arbitrary file writes via malicious pkg-config directives (CVE-2025-61731), and excessive CPU consumption in archive/zip processing (CVE-2025-61728). The update is an important security advisory from Red Hat, with no known exploits in the wild. The affected versions are >=3.1.0 and <3.1.6.
Potential Impact
The primary impact is denial of service due to memory exhaustion when processing a large number of unique query parameters in HTTP requests, potentially causing the affected application to crash or become unresponsive. Other vulnerabilities fixed may lead to unexpected session resumption, code injection via doc comments, arbitrary file writes, and excessive CPU consumption, which could degrade service availability or lead to other security risks. There is no impact on confidentiality or integrity reported for the denial of service vulnerability. Overall, the vulnerabilities pose a high risk to service availability.
Mitigation Recommendations
Red Hat has released OpenShift Service Mesh version 3.1.6 which includes fixes for these vulnerabilities. Users should update to version 3.1.6 as soon as possible to remediate the issues. Red Hat has not identified practical mitigations other than applying the update. No action beyond upgrading is indicated by the vendor advisory.
Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.6
Description
Red Hat OpenShift Service Mesh 3.1.6, 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. Fixes/Improvements: * Multiple InferencePools on same Gateway - ext_proc lost for all but first (OSSM-12585) Security Fix(es): * istio-rhel9-operator: Unexpected session resumption in crypto/tls (CVE-2025-68121) * istio-cni-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121) * istio-pilot-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121) * istio-proxyv2-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121) * istio-rhel9-operator: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732) * istio-cni-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732) * istio-pilot-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732) * istio-proxyv2-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732) * istio-rhel9-operator: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731) * istio-cni-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731) * istio-pilot-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731) * istio-proxyv2-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731) * istio-rhel9-operator: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * istio-cni-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * istio-pilot-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * istio-proxyv2-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728) * istio-rhel9-operator: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * istio-cni-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * istio-pilot-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * istio-proxyv2-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * istio-pilot-rhel9: JWKS Resolver Failure May Expose Hardcoded Default Keys (CVE-2026-31837) * istio-proxyv2-rhel9: JWKS Resolver Failure May Expose Hardcoded Default Keys (CVE-2026-31837)
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat OpenShift Service Mesh 3.1.6, based on the Istio project, includes fixes for several security vulnerabilities. Notably, CVE-2025-61726 is a denial of service vulnerability in the Go standard library's net/url package, where no limit is enforced on the number of unique query parameters parsed. An attacker can exploit this by sending a crafted HTTP request with many unique query parameters, causing excessive memory use and application crash or unresponsiveness. Additional fixes address unexpected session resumption in crypto/tls (CVE-2025-68121), code smuggling via doc comments (CVE-2025-61732), arbitrary file writes via malicious pkg-config directives (CVE-2025-61731), and excessive CPU consumption in archive/zip processing (CVE-2025-61728). The update is an important security advisory from Red Hat, with no known exploits in the wild. The affected versions are >=3.1.0 and <3.1.6.
Potential Impact
The primary impact is denial of service due to memory exhaustion when processing a large number of unique query parameters in HTTP requests, potentially causing the affected application to crash or become unresponsive. Other vulnerabilities fixed may lead to unexpected session resumption, code injection via doc comments, arbitrary file writes, and excessive CPU consumption, which could degrade service availability or lead to other security risks. There is no impact on confidentiality or integrity reported for the denial of service vulnerability. Overall, the vulnerabilities pose a high risk to service availability.
Mitigation Recommendations
Red Hat has released OpenShift Service Mesh version 3.1.6 which includes fixes for these vulnerabilities. Users should update to version 3.1.6 as soon as possible to remediate the issues. Red Hat has not identified practical mitigations other than applying the update. No action beyond upgrading is indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:5950
- Cve Count
- 6
- Additional Cves
- ["CVE-2025-61728","CVE-2025-61731","CVE-2025-61732","CVE-2025-68121","CVE-2026-31837"]
- State
- PUBLISHED
Threat ID: 6a160964e29bf47b50629c33
Added to database: 05/26/2026, 20:58:12 UTC
Last enriched: 08/14/2026, 19:29:35 UTC
Last updated: 09/12/2026, 02:05:53 UTC
Views: 101
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