Summary
Workarounds
There is no configuration workaround to enable IPsec IPv6 in affected versions. If an immediate upgrade is not possible, user may consider using WireGuard instead for inter-Node Pod traffic encryption. The WireGuard support in Antrea does not suffer from the same issue.
Resources
Pull Request with Fix: antrea-io/antrea#7759
Validation Tool PR: antrea-io/antrea#7757
Antrea Documentation: Traffic Encryption Guide
Impact
This is a missing encryption vulnerability (CWE-311) affecting inter-Node Pod traffic. In Antrea clusters configured for dual-stack networking with IPsec encryption enabled (trafficEncryptionMode: ipsec), Antrea fails to apply encryption for IPv6 Pod traffic.
While the IPv4 traffic is correctly encrypted via ESP (Encapsulating Security Payload), traffic using IPv6 is transmitted in plaintext. This occurs because the packets are encapsulated (using Geneve or VXLAN) but bypass the IPsec encryption layer.
Impacted Users: users with dual-stack clusters and IPsec encryption enabled.
Single-stack IPv4 or IPv6 clusters are not affected.
CVE-2026-34992 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.11.0-alpha.0.0.20260225185322-738bad662b20); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
Yes, the issue has been patched: https://github.com/antrea-io/antrea/pull/7759
Users should upgrade to one of the following versions:
- Antrea v2.6.0 or later
- Antrea v2.5.2
- Antrea v2.4.5
Antrea recommends running the antctl check installation --run ipsec tool after upgrading to verify that both address families are correctly producing ESP traffic.
Frequently Asked Questions
- What is CVE-2026-34992? CVE-2026-34992 is a high-severity security vulnerability in antrea.io/antrea (go), affecting versions >= 1.11.0, < 2.4.5. It is fixed in 1.11.0-alpha.0.0.20260225185322-738bad662b20.
- How severe is CVE-2026-34992? CVE-2026-34992 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of antrea.io/antrea are affected by CVE-2026-34992? antrea.io/antrea (go) versions >= 1.11.0, < 2.4.5 is affected.
- Is there a fix for CVE-2026-34992? Yes. CVE-2026-34992 is fixed in 1.11.0-alpha.0.0.20260225185322-738bad662b20. Upgrade to this version or later.
- Is CVE-2026-34992 exploitable, and should I be worried? Whether CVE-2026-34992 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-34992 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-34992? Upgrade
antrea.io/antreato 1.11.0-alpha.0.0.20260225185322-738bad662b20 or later.