CVE-2022-23551: AAD Pod Identity obtaining token with backslash

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-21 · updated 2026-06-17
Weakness: CWE-1259

Description

aad-pod-identity assigns Azure Active Directory identities to Kubernetes applications and has now been deprecated as of 24 October 2022. The NMI component in AAD Pod Identity intercepts and validates token requests based on regex. In this case, a token request made with backslash in the request (example: `/metadata/identity\oauth2\token/`) would bypass the NMI validation and be sent to IMDS allowing a pod in the cluster to access identities that it shouldn't have access to. This issue has been fixed and has been included in AAD Pod Identity release version 1.8.13. If using the AKS pod-managed identities add-on, no action is required. The clusters should now be running the version 1.8.13 release.

Affected products

Azure aad-pod-identity: before 1.8.13 — fixed in 1.8.13
Azure aad-pod-identity: before 1.8.13

How to fix

Upgrade to a fixed version: Azure aad-pod-identity 1.8.13. Check the vendor advisory for mitigations.

References

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