CVE-2026-26287
CVE-2026-26287 is a high-severity vulnerability with a CVSS 3.x base score of 7.1. The underlying weakness is classified as CWE-696.
Key facts
- Severity: High (CVSS 3.x base score 7.1)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-696
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-26287?
- 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.
- How severe is CVE-2026-26287?
- CVE-2026-26287 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2026-26287 being actively exploited?
- It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.
- How do I fix CVE-2026-26287?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2026-26287 published?
- CVE-2026-26287 was published on 2026-10-06.
References
- https://github.com/external-secrets/external-secrets/commit/25aa09275861e3ed6fc5d2a1a60b9ac3df4a93ba
- https://github.com/external-secrets/external-secrets/pull/5901
- https://github.com/external-secrets/external-secrets/releases/tag/v1.3.2
- https://github.com/external-secrets/external-secrets/security/advisories/GHSA-q7hv-xx6h-q2x8
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