PatchSiren cyber security CVE debrief

CVE-2026-55069 kestra-io CVE debrief

CVE-2026-55069 is a high-severity vulnerability in the Kestra OSS workflow orchestration platform's BasicAuth authentication component. An attacker with read access to the PostgreSQL database can exploit this vulnerability to recover the administrator password offline due to SHA-512's high computation speed. In Kubernetes deployments, a successful crack enables reading of the cluster ServiceAccount Token and all K8s Secrets, leading to vertical privilege escalation. The vulnerability is fixed in version 1.3.24. Users should update to the patched version to prevent exploitation. This vulnerability has a CVSS score of 8.7 and is considered HIGH severity.

Vendor: kestra-io
Product: kestra
CVSS: HIGH 8.7
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-26
Original CVE updated: 2026-06-29
Advisory published: 2026-06-26
Advisory updated: 2026-06-29

Who should care

Security teams and administrators responsible for Kestra OSS workflow orchestration platforms, especially those using Kubernetes deployments, should be aware of this vulnerability. They should assess their current version and update to 1.3.24 or later to mitigate the risk. Additionally, teams should monitor their PostgreSQL databases for unauthorized access and consider implementing compensating controls to protect sensitive data.

Technical summary

The vulnerability exists in the BasicAuth authentication component of the Kestra OSS workflow orchestration platform. An attacker with read access to the PostgreSQL database can exploit SHA-512's high computation speed to recover the administrator password offline. In Kubernetes deployments, this can lead to vertical privilege escalation by enabling the reading of the cluster ServiceAccount Token and all K8s Secrets. The vulnerability is fixed in version 1.3.24. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.

Defensive priority

High priority should be given to updating Kestra to version 1.3.24 or later. In the meantime, defenders should monitor PostgreSQL database access and consider implementing additional security measures to protect sensitive data.

Recommended defensive actions

Update Kestra to version 1.3.24 or later
Monitor PostgreSQL database access for unauthorized activity
Implement compensating controls to protect sensitive data
Review Kubernetes deployments for potential privilege escalation
Consider additional security measures to protect cluster ServiceAccount Tokens and K8s Secrets

Evidence notes

The CVE-2026-55069 vulnerability is documented in the official CVE record and NVD detail pages. The vulnerability is fixed in Kestra version 1.3.24. The CVSS score for this vulnerability is 8.7, indicating high severity. The vulnerability allows for offline recovery of the administrator password, which can lead to vertical privilege escalation in Kubernetes deployments.

Official resources

This AI-assisted debrief is based on the supplied source corpus and official links. The information provided is for defensive purposes only and is intended to help security teams and administrators understand and mitigate the vulnerability.