CVE-2026-26287: high-severity vulnerability in external-secrets
External Secrets Operator: label enforcement bypass in webhook generator enables secret exfiltration
Published
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.2%
exploitation probability
0.2%top 86% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Affected products
external-secrets · external-secretsRelated CVEs — external-secrets
In the same product, most dangerous first.
CVE-2024-45041HIGHExternal Secrets Operator vulnerable to privilege escalationEPSS 0.6%CVE-2026-34984HIGHExternal Secrets Operator has DNS exfiltration via getHostByName in its v2 template engineEPSS 0.4%CVE-2026-42875MEDIUMExternal Secrets Operator: Namespace Isolation Bypass in CAProvider ConfigMap Resolution for SecretStoreEPSS 0.4%CVE-2025-55196HIGHExternal Secrets Operator Missing Namespace Restriction in PushSecret and SecretStore List() Calls Allows Unauthorized Secret AccessEPSS 0.4%CVE-2025-62159HIGHExternal Secrets Operator's BeyondTrust Provider has Insecure Secret RetrievalEPSS 0.3%CVE-2026-42876MEDIUMExternal Secrets Operator: Privilege escalation with secret overwritingEPSS 0.3%
References
https://github.com/external-secrets/external-secrets/commit/25aa09275861e3ed6fc5d2a1a60b9ac3df4a93bahttps://github.com/external-secrets/external-secrets/pull/5901https://github.com/external-secrets/external-secrets/releases/tag/v1.3.2https://github.com/external-secrets/external-secrets/security/advisories/GHSA-q7hv-xx6h-q2x8