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TI-2026-29305 Aliases CVE-2026-40564GHSA-rj6x-mg28-wf4x

Apache Flink Kubernetes Operator: Server-Side Request Forgery and local file access in Kubernetes Operator

Priority LOW 30CWE-552Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-552.

Summary

Files or Directories Accessible to External Parties, Server-Side Request Forgery (SSRF) vulnerability in Apache Flink Kubernetes Operator. The FlinkSessionJob jarURI is currently not validated so that it points to user-owned files or addresses.  This lets a user with CR create permissions read files from the operator pod's filesystem and pull content from any backing store reachable through Flink's pluggable filesystem layer and access them through the submitted Flink job. Furthermore for fetching from http/https addresses there is currently no allowlist on the URI scheme, no host check, no IP-range restriction, and no protection against pointing the URI at internal or link-local addresses.This issue affects Apache Flink Kubernetes Operator: from 1.3.0 before 1.15.0. Users are recommended to upgrade to version 1.15.0, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00666 52nd percentileScored 2026-11-07
Fix Fixed Apache Flink Kubernetes Operator (Apache Software Foundation): 1.15.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Flink Kubernetes Operator1.3.0 to before 1.15.01.15.0Patch availableCNA
  • Apache Flink Kubernetes Operator VendorApache Affected 1.3.0 to before 1.15.0 Fixed in 1.15.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:flink_kubernetes_operator:*:*:*:*:*:*:*:*1.3.0 to before 1.15.0VulnerableApache
  • cpe:2.3:a:apache:flink_kubernetes_operator:*:*:*:*:*:*:*:* Versions 1.3.0 to before 1.15.0 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Flink Kubernetes Operator (Apache Software Foundation) Fixed in 1.15.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40564
  2. 2026-10-03 Alias added: GHSA-rj6x-mg28-wf4x
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences