CVE-2026-26287: external-secrets Incorrect Behavior Order

Vulnerability summary

CVE-2026-26287 is a high (CVSS 7.1) Incorrect Behavior Order vulnerability in external-secrets. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.7% of scored vulnerabilities.

Timeline

1. 06-10-2026
   PublishedVulnerability first disclosed.
2. 06-10-2026
   Last modifiedVulnerability information updated.

Description

External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Starting in version 0.10.0 and prior to version 1.3.2, a bug in the `webhook` generator initialization order incorrectly cleared the label-enforcement flag (`EnforceLabels`) after it was set, resulting in the provider-side check for `external-secrets.io/type=webhook` being skipped (and the operation to succeed while it should have failed with `secret does not contain needed label 'external-secrets.io/type: webhook'. Update secret label to use it with webhook`. Version 1.3.2 contains a patch.

• CWE-696Incorrect Behavior OrderThe product performs multiple related behaviors, but the behaviors are performed in the wrong order in ways that may produce resultant weaknesses.