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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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-55069 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-55069

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-55069 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-55069

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.