GHSA-pfhr-pccp-hwmh
Network Policies & (Clusterwide) Cilium Network Policies with namespace label selectors may unexpectedly select pods with maliciously crafted labels
GHSA-pfhr-pccp-hwmh is a medium vulnerability (CVSS 4.3) in github.com/cilium/cilium, published August 30, 2022. No source lists public exploit code. Fixed in github.com/cilium/cilium 1.10.14.
- Severity
- 4.3 MediumCVSS 3.1, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
1.10.14github.com/cilium/cilium +6 more
Description
Impact
If a user has Network Policies with namespace selectors selecting labels of namespaces, or (clusterwide) Cilium Network Policies matching on namespace labels, then it is possible for an attacker with Kubernetes pod deploy rights (either directly or indirectly via higher-level APIs such as Deployment, Daemonset etc) to craft additional pod labels such that the pod is selected by another policy that exists rather than the expected policy.
Patches
The problem has been fixed and is available on versions >=1.10.14, >=1.11.8, >=1.12.1
Workarounds
There are no workarounds available.
Acknowledgements
The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to Sander Mathijssen for not only highlighting the issue but also proposing a resolution.
For more information
If you have any questions or comments about this advisory, please reach out on Slack.
As usual, if you think you found a related vulnerability, we strongly encourage you to report security vulnerabilities to our private security mailing list: security@cilium.io - first, before disclosing them in any public forums. This is a private mailing list where only members of the Cilium internal security team are subscribed to, and is treated as top priority.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/cilium/ciliumGo | through 1.10.13 | 1.10.14 |
github.com/cilium/ciliumGo | 1.11.0 to 1.11.7 | 1.11.8 |
github.com/cilium/ciliumGo | 1.12.0 to 1.12.0 | 1.12.1 |
github.com/cilium/ciliumGo | before 1.10.14 | 1.10.14 |
github.com/cilium/ciliumGo | 1.11.0 up to 1.11.8 | 1.11.8 |
github.com/cilium/ciliumGo | 1.12.0 up to 1.12.1 | 1.12.1 |
github.com/cilium/ciliumGo | before 1.10.14, 1.11.0 up to 1.11.8, 1.12.0 up to 1.12.1 | 1.10.141.11.81.12.1 |
What each source reports
GitHub Advisories Score used
Network Policies & (Clusterwide) Cilium Network Policies with namespace label selectors may unexpectedly select pods with maliciously crafted labels
Impact
If a user has Network Policies with namespace selectors selecting labels of namespaces, or (clusterwide) Cilium Network Policies matching on namespace labels, then it is possible for an attacker with Kubernetes pod deploy rights (either directly or indirectly via higher-level APIs such as Deployment, Daemonset etc) to craft additional pod labels such that the pod is selected by another policy that exists rather than the expected policy.
Patches
The problem has been fixed and is available on versions >=1.10.14, >=1.11.8, >=1.12.1
Workarounds
There are no workarounds available.
Acknowledgements
The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to Sander Mathijssen for not only highlighting the issue but also proposing a resolution.
For more information
If you have any questions or comments about this advisory, please reach out on Slack.
As usual, if you think you found a related vulnerability, we strongly encourage you to report security vulnerabilities to our private security mailing list: security@cilium.io - first, before disclosing them in any public forums. This is a private mailing list where only members of the Cilium internal security team are subscribed to, and is treated as top priority.
- Record
GHSA-pfhr-pccp-hwmh- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSV
Network Policies & (Clusterwide) Cilium Network Policies with namespace label selectors may unexpectedly select pods with maliciously crafted labels
Impact
If a user has Network Policies with namespace selectors selecting labels of namespaces, or (clusterwide) Cilium Network Policies matching on namespace labels, then it is possible for an attacker with Kubernetes pod deploy rights (either directly or indirectly via higher-level APIs such as Deployment, Daemonset etc) to craft additional pod labels such that the pod is selected by another policy that exists rather than the expected policy.
Patches
The problem has been fixed and is available on versions >=1.10.14, >=1.11.8, >=1.12.1
Workarounds
There are no workarounds available.
Acknowledgements
The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to Sander Mathijssen for not only highlighting the issue but also proposing a resolution.
For more information
If you have any questions or comments about this advisory, please reach out on Slack.
As usual, if you think you found a related vulnerability, we strongly encourage you to report security vulnerabilities to our private security mailing list: security@cilium.io - first, before disclosing them in any public forums. This is a private mailing list where only members of the Cilium internal security team are subscribed to, and is treated as top priority.
- Record
GHSA-pfhr-pccp-hwmh- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVGO-2022-0959No score
Network Policies & (Clusterwide) Cilium Network Policies with namespace label selectors may unexpectedly select pods with maliciously crafted labels in github.com/cilium/cilium
Network Policies & (Clusterwide) Cilium Network Policies with namespace label selectors may unexpectedly select pods with maliciously crafted labels in github.com/cilium/cilium
- Record
GO-2022-0959- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.