DNS Exfiltration Vulnerability in External Secrets Operator by External Secrets
CVE-2026-34984

7.1HIGH

Key Information:

Vendor

External-secrets

Status
External-secrets
Vendor
CVE Published:
14 April 2026

What is CVE-2026-34984?

External Secrets Operator improperly manages templates, allowing attackers to exploit user-controlled templates to perform DNS lookups. This can lead to sensitive data being leaked via DNS queries, posing significant confidentiality risks, especially in environments with untrusted users. The vulnerability has been resolved in version 2.3.0.

Affected Version(s)

external-secrets < 2.3.0

References

https://github.com/external-secrets/external-secrets/secu...
x_refsource_CONFIRM
https://github.com/external-secrets/external-secrets/comm...
x_refsource_MISC
https://github.com/external-secrets/external-secrets/rele...
x_refsource_MISC

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.