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CVE-2024-28250

Cilium has possible unencrypted traffic between nodes when using WireGuard and L7 policies

6.1 MediumFix available

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Attack profile

How easy it is to exploit

Attack vector
Adjacent network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.17%Up 0.1 points since Mar 19, 2024
90%50%10%1%

What each source reports

CVE List Score used 6.1

Cilium has possible unencrypted traffic between nodes when using WireGuard and L7 policies

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
CVE-2024-28250
CVSS 3.1
6.1 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-311
Updated
2026-11-02
EUVDEUVD-2024-1011 6.1

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
EUVD-2024-1011
CVSS 3.1
6.1 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-v6q2-4qr3-5cw6 6.1

Unencrypted traffic between nodes when using WireGuard and L7 policies

Impact

In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies:

  • Traffic that should be WireGuard-encrypted is sent unencrypted between a node's Envoy proxy and pods on other nodes.
  • Traffic that should be WireGuard-encrypted is sent unencrypted between a node's DNS proxy and pods on other nodes.

Patches

This issue affects:

  • In native routing mode (routingMode=native):
    • Cilium v1.14 versions before v1.14.8
    • Cilium v1.15 versions before v1.15.2
  • In tunneling mode (routingMode=tunnel):
    • Cilium v1.14 versions before v1.14.4
    • Cilium v1.14.4 if encryption.wireguard.encapsulate is set to false (default).

This issue has been resolved in:

  • In native routing mode (routingMode=native):
    • Cilium v1.14.8
    • Cilium v1.15.2
  • In tunneling mode (routingMode=tunnel):
    • Cilium v1.14.4. NOTE encryption.wireguard.encapsulate must be set to true.

Workarounds

There is no workaround to this issue.

Acknowledgements

The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @brb, @giorio94, @gandro and @jschwinger233 for their work on triaging and remediating this issue.

For more information

If you have any questions or comments about this advisory, please reach out on Slack.

If you think you found a related vulnerability, we strongly encourage you to report security vulnerabilities to our private security mailing list at [email protected]. This is a private mailing list where only members of the Cilium internal security team are subscribed to, and your report will be treated as top priority.

Record
GHSA-v6q2-4qr3-5cw6
CVSS 3.1
6.1 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-311, CWE-319
Updated
2026-11-02
NVD 6.1

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
CVE-2024-28250
CVSS 3.1
6.1 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-311, CWE-319
Updated
2026-11-02
OSV 6.1

Cilium has possible unencrypted traffic between nodes when using WireGuard and L7 policies

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
CVE-2024-28250
CVSS 3.1
6.1 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-311
Updated
2026-11-02
OSVGHSA-v6q2-4qr3-5cw6 6.1

Unencrypted traffic between nodes when using WireGuard and L7 policies

Impact

In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies:

  • Traffic that should be WireGuard-encrypted is sent unencrypted between a node's Envoy proxy and pods on other nodes.
  • Traffic that should be WireGuard-encrypted is sent unencrypted between a node's DNS proxy and pods on other nodes.

Patches

This issue affects:

  • In native routing mode (routingMode=native):
    • Cilium v1.14 versions before v1.14.8
    • Cilium v1.15 versions before v1.15.2
  • In tunneling mode (routingMode=tunnel):
    • Cilium v1.14 versions before v1.14.4
    • Cilium v1.14.4 if encryption.wireguard.encapsulate is set to false (default).

This issue has been resolved in:

  • In native routing mode (routingMode=native):
    • Cilium v1.14.8
    • Cilium v1.15.2
  • In tunneling mode (routingMode=tunnel):
    • Cilium v1.14.4. NOTE encryption.wireguard.encapsulate must be set to true.

Workarounds

There is no workaround to this issue.

Acknowledgements

The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @brb, @giorio94, @gandro and @jschwinger233 for their work on triaging and remediating this issue.

For more information

If you have any questions or comments about this advisory, please reach out on Slack.

If you think you found a related vulnerability, we strongly encourage you to report security vulnerabilities to our private security mailing list at [email protected]. This is a private mailing list where only members of the Cilium internal security team are subscribed to, and your report will be treated as top priority.

Record
GHSA-v6q2-4qr3-5cw6
CVSS 3.1
6.1 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-311, CWE-319
Updated
2026-11-02
Show 8 moreShow less
OSVBIT-cilium-2024-28250 No score

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
BIT-cilium-2024-28250
Updated
2026-11-02
OSVBIT-cilium-operator-2024-28250 No score

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
BIT-cilium-operator-2024-28250
Updated
2026-11-02
OSVBIT-cilium-proxy-2024-28250 No score

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
BIT-cilium-proxy-2024-28250
Updated
2026-11-02
OSVBIT-hubble-2024-28250 No score

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
BIT-hubble-2024-28250
Updated
2026-11-02
OSVBIT-hubble-relay-2024-28250 No score

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
BIT-hubble-relay-2024-28250
Updated
2026-11-02
OSVBIT-hubble-ui-2024-28250 No score

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
BIT-hubble-ui-2024-28250
Updated
2026-11-02
OSVBIT-hubble-ui-backend-2024-28250 No score

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (routingMode=native) and in Cilium 1.14.4 in tunneling mode (routingMode=tunnel). Not that in tunneling mode, encryption.wireguard.encapsulate must be set to true. There is no known workaround for this issue.

Record
BIT-hubble-ui-backend-2024-28250
Updated
2026-11-02
OSVGO-2024-2657 No score

Unencrypted traffic between nodes with WireGuard in github.com/cilium/cilium

In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies: traffic that should be WireGuard-encrypted is sent unencrypted between a node's Envoy proxy and pods on other nodes, and traffic that should be WireGuard-encrypted is sent unencrypted between a node's DNS proxy and pods on other nodes.

Record
GO-2024-2657
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/cilium/cilium
Go
 1.14.0 up to 1.14.8
1.14.8
github.com/cilium/cilium
Go
 1.15.0 up to 1.15.2
1.15.2
cilium
Bitnami
 1.14.0 up to 1.14.8, 1.15.0 up to 1.15.2
1.14.81.15.2
cilium-operator
Bitnami
 1.14.0 up to 1.14.8, 1.15.0 up to 1.15.2
1.14.81.15.2
cilium-proxy
Bitnami
 1.14.0 up to 1.14.8, 1.15.0 up to 1.15.2
1.14.81.15.2
hubble
Bitnami
 1.14.0 up to 1.14.8, 1.15.0 up to 1.15.2
1.14.81.15.2
hubble-relay
Bitnami
 1.14.0 up to 1.14.8, 1.15.0 up to 1.15.2
1.14.81.15.2
hubble-ui
Bitnami
 1.14.0 up to 1.14.8, 1.15.0 up to 1.15.2
1.14.81.15.2
hubble-ui-backend
Bitnami
 1.14.0 up to 1.14.8, 1.15.0 up to 1.15.2
1.14.81.15.2
github.com/cilium/cilium
Go
 1.14.0 up to 1.14.8, 1.15.0 up to 1.15.2
1.14.81.15.2

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-28250 is a medium vulnerability (CVSS 6.1) in Cilium, published March 18, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 6th percentile. Fixed in github.com/cilium/cilium 1.14.8.

References

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