CVE-2026-40564

0.0

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

Overview
Vulnerability Timeline

Overview

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.

Details

INFO

Published Date :

May 26, 2026, 4:16 p.m.

Last Modified :

May 26, 2026, 7:05 p.m.

Remotely Exploit :

No

Source :

[email protected]

Impact

Affected Products

The following products are affected by CVE-2026-40564 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0

Solution

Upgrade Apache Flink Kubernetes Operator to version 1.15.0 to address SSRF and file access vulnerabilities.

Upgrade Apache Flink Kubernetes Operator to version 1.15.0.
Validate jarURI to prevent external file access.
Implement allowlist for URI schemes.
Restrict host and IP ranges.

References

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-40564.

URL	Resource
https://lists.apache.org/thread/jvxs2kh2o60sl7qkl5nss4r5phzfl4cz
http://www.openwall.com/lists/oss-security/2026/05/26/6

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-40564 is associated with the following CWEs:

CWE-552: Files or Directories Accessible to External Parties

CWE-918: Server-Side Request Forgery (SSRF)

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-40564 weaknesses.

CAPEC-150: Collect Data from Common Resource Locations Collect Data from Common Resource Locations CAPEC-639: Probe System Files Probe System Files CAPEC-664: Server Side Request Forgery Server Side Request Forgery

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-40564 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-40564 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

CVE Modified by af854a3a-2127-422b-91ae-364da2661108

May. 26, 2026

Action	Type	Old Value	New Value
Added	Reference		http://www.openwall.com/lists/oss-security/2026/05/26/6

New CVE Received by [email protected]