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Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M

CVE-2026-26287External Secrets Operator: label enforcement bypass in webhook generator enables secret exfiltration

High 7.1

In plain English

A high-severity security flaw in external-secrets from external-secrets. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 84.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/external-secrets/external-secrets1.3.2GHSA-q7hv-xx6h-q2x8
Gogithub.com/external-secrets/external-secrets1.3.2GO-2026-6667

Affected products (as reported)

VendorProductVersions
external-secrets external-secrets >= 0.10.0, < 1.3.2

Weakness: CWE-696 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

References