CVE-2026-34992: CWE-311: Missing Encryption of Sensitive Data in antrea-io antrea
Antrea is a Kubernetes networking solution intended to be Kubernetes native. Prior to 2.4.5 and 2.5.2, a missing encryption vulnerability affects 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. This vulnerability is fixed in 2.4.5 and 2.5.2.
AI Analysis
Technical Summary
Antrea versions before 2.4.5 and between 2.5.0 and 2.5.2 have a vulnerability where IPv6 Pod traffic in dual-stack Kubernetes clusters with IPsec encryption enabled is not encrypted. Although IPv4 traffic is encrypted using ESP, IPv6 traffic is encapsulated but bypasses the IPsec encryption layer, resulting in plaintext transmission. This affects only dual-stack clusters with IPsec enabled and does not impact single-stack deployments. The issue is fixed in versions 2.4.5 and 2.5.2.
Potential Impact
The vulnerability allows IPv6 Pod traffic in dual-stack Antrea clusters with IPsec encryption enabled to be transmitted without encryption, exposing potentially sensitive inter-Node Pod traffic to interception or eavesdropping. IPv4 traffic remains protected. This compromises confidentiality of IPv6 Pod communications in affected environments.
Mitigation Recommendations
This vulnerability is fixed in Antrea versions 2.4.5 and 2.5.2. Users running affected versions should upgrade to these or later versions to ensure IPv6 Pod traffic is properly encrypted when IPsec is enabled in dual-stack clusters. Patch status is not explicitly stated but the fix is available in these versions. No additional mitigations are indicated.
CVE-2026-34992: CWE-311: Missing Encryption of Sensitive Data in antrea-io antrea
Description
Antrea is a Kubernetes networking solution intended to be Kubernetes native. Prior to 2.4.5 and 2.5.2, a missing encryption vulnerability affects 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. This vulnerability is fixed in 2.4.5 and 2.5.2.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Antrea versions before 2.4.5 and between 2.5.0 and 2.5.2 have a vulnerability where IPv6 Pod traffic in dual-stack Kubernetes clusters with IPsec encryption enabled is not encrypted. Although IPv4 traffic is encrypted using ESP, IPv6 traffic is encapsulated but bypasses the IPsec encryption layer, resulting in plaintext transmission. This affects only dual-stack clusters with IPsec enabled and does not impact single-stack deployments. The issue is fixed in versions 2.4.5 and 2.5.2.
Potential Impact
The vulnerability allows IPv6 Pod traffic in dual-stack Antrea clusters with IPsec encryption enabled to be transmitted without encryption, exposing potentially sensitive inter-Node Pod traffic to interception or eavesdropping. IPv4 traffic remains protected. This compromises confidentiality of IPv6 Pod communications in affected environments.
Mitigation Recommendations
This vulnerability is fixed in Antrea versions 2.4.5 and 2.5.2. Users running affected versions should upgrade to these or later versions to ensure IPv6 Pod traffic is properly encrypted when IPsec is enabled in dual-stack clusters. Patch status is not explicitly stated but the fix is available in these versions. No additional mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-31T19:38:31.618Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d4982faaed68159ac9fe11
Added to database: 4/7/2026, 5:37:51 AM
Last enriched: 4/7/2026, 5:38:50 AM
Last updated: 4/8/2026, 12:46:24 AM
Views: 7
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