CVE-2026-59341 Bitnami CVE debrief

Who should care

Defenders who manage Sealed Secrets controller's internal service port and Kubernetes cluster should assess exposure and prioritize verification and remediation. They should review and update configurations to prevent unauthorized access and restrict access to the controller's internal service port.

Why it matters

Defenders should prioritize verifying exposure of Sealed Secrets controller's internal service port and restrict access to it. They should also review and update configurations to prevent unauthorized access.

• Decrypt and recover plaintext of sealed secrets
• Verify exposure of Sealed Secrets controller's internal service port
• Restrict access to the controller's internal service port
• Review and update configurations to prevent unauthorized access

Technical summary

The vulnerability is caused by missing AEAD label binding and a side-channel oracle in the Sealed Secrets controller's unauthenticated POST endpoints. An attacker with internal network access can abuse the handler as a decryption oracle to recover the full plaintext of any sealed secret. The spec.template.data field is omitted from the AEAD authenticated-data label binding ciphertext to metadata, allowing for arbitrary template logic injection and differential response-based secret extraction via HTTP response codes.

Defensive priority

Defenders should prioritize verifying exposure of Sealed Secrets controller's internal service port and restrict access to it. They should also review and update configurations to prevent unauthorized access.

Recommended defensive actions

• Verify exposure of Sealed Secrets controller's internal service port
• Restrict access to the controller's internal service port
• Review and update configurations to prevent unauthorized access
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The vulnerability is caused by missing AEAD label binding and a side-channel oracle in the Sealed Secrets controller's unauthenticated POST endpoints. An attacker with internal network access can abuse the handler as a decryption oracle to recover the full plaintext of any sealed secret. The spec.template.data field is omitted from the AEAD authenticated-data label binding ciphertext to metadata. Template execution errors map directly to HTTP response codes, allowing for differential response and secret extraction.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.