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🛡️ CVE-2026-34992 — antrea

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-311 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Antrea has Missing Encryption of Sensitive Data

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.

Patches

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.

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](https://github.com/antrea-io/antrea/pull/7759)

Validation Tool PR: [antrea-io/antrea#7757](https://github.com/antrea-io/antrea/pull/7757)

Antrea Documentation: [Traffic Encryption Guide](https://github.com/antrea-io/antrea/blob/main/docs/traffic-encryption.md)

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2026-34992 is classified as CWE-311: Missing Encryption of Sensitive Data. Sensitive data is stored or transmitted in the clear, so anyone able to observe it can read it.

Affected software

CVE-2026-34992 is recorded against 2 packages.

  • antrea (from 2.5.0 up to 2.5.2)
  • antrea.io/antrea

Timeline and source

Published on 6 April 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
github.com
github.com
github.com

Other advisories for this package

antrea has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-311: Missing Encryption of Sensitive Data) in other software:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-311
Public Exploit ✅ No
Source NVD
Published 2026-04-06
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
antrea 2.5.0 2.5.2
antrea.io/antrea — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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