CVE-2026-26287 · GHSA-q7hv-xx6h-q2x8

External Secrets Operator: label enforcement bypass in webhook generator enables secret exfiltration

Risk score: 51/100
CVSS: 7.1 v3.1
Exploit chance (30 days): 0.2%
Published: 6 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is: 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, …
Affected: github.com/external-secrets/external-secrets (go) >= 0.10.0, < 1.3.2
Fix: Upgrade github.com/external-secrets/external-secrets to 1.3.2 or later.
Exploitation: No known exploitation

Why it is Yellow

CVSS 7.1 high
On your watchlist: Go

Affected packages

Package	Ecosystem	Vulnerable	Fixed in
github.com/external-secrets/external-secrets	go	>= 0.10.0, < 1.3.2	1.3.2

References

Original 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.

Last activity 6 Oct 2026. Patch Forecast updates every hour.