vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-40564

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

MEDIUM
6.5
CVSS Score
Published: May 26, 2026 at 02:38 PM UTC
Updated: July 24, 2026 at 11:23 AM UTC
1 product affected across 1 vendorFlink Kubernetes Operator

Using Apache Flink Kubernetes Operator by Apache Software Foundation?

Get instant alerts when new vulnerabilities affect Apache Flink Kubernetes Operator - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM6.5
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Flink Kubernetes Operator· Apache
95%
1.3.0 ≤ v < 1.15.01.3.0
Affected range stops below 1.15.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryMailing List
Source: cverecord
https://lists.apache.org/thread/jvxs2kh2o60sl7qkl5nss4r5phzfl4cz
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/05/26/6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-552CWE-918

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card