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CVE-2026-40564

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

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.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Flink Kubernetes Operator
CVE-2026-35194

Apache Flink: Remote code execution via SQL injection in code generation

Code injection in SQL code generation in Apache Flink 1.15.0 through 1.20.x and 2.0.0 through 2.x allows authenticated users with query submission privileges to execute arbitrary code on TaskManagers via maliciously crafted SQL queries. The vulnerability affects JSON functions (1.15.0+) and LIKE expressions with ESCAPE clauses (1.17.0+). User-controlled strings are interpolated into generated Java code without proper escaping, allowing attackers to break out of string literals and inject arbitrary expressions. Users are recommended to upgrade to either version 1.20.4, 2.0.2, 2.1.2 or 2.2.1, which fixes this issue.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Flink
CVE-2025-62228

Apache Flink CDC, Apache Flink CDC, Apache Flink CDC, Apache Flink CDC, Apache Flink CDC: SQL injection via maliciously crafted identifiers

Apache Flink CDC version 3.4.0 was vulnerable to a SQL injection via maliciously crafted identifiers eg. crafted database name or crafted table name. Even through only the logged-in database user can trigger the attack, we recommend users update Flink CDC version to 3.5.0 which address this issue.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Flink Flink Cdc
CVE-2020-17519

Apache Flink directory traversal attack: reading remote files through the REST API

A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.

CVSS 3.1 · 9.1 Critical EPSS 98.0% KEV · Listed
Vendors
Apache
Products
Flink
CVE-2023-41834

Apache Flink Stateful Functions allowed HTTP header injection due to Improper Neutralization of CRLF Sequences

Improper Neutralization of CRLF Sequences in HTTP Headers in Apache Flink Stateful Functions 3.1.0, 3.1.1 and 3.2.0 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via crafted HTTP requests. Attackers could potentially inject malicious content into the HTTP response that is sent to the user's browser. Users should upgrade to Apache Flink Stateful Functions version 3.3.0.

CVSS 3.1 · 6.1 Medium EPSS 2.3% KEV · Not listed
Vendors
Apache
Products
Flink Stateful Functions
CVE-2020-17518

Apache Flink directory traversal attack: remote file writing through the REST API

Apache Flink 1.5.1 introduced a REST handler that allows you to write an uploaded file to an arbitrary location on the local file system, through a maliciously modified HTTP HEADER. The files can be written to any location accessible by Flink 1.5.1. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit a5264a6f41524afe8ceadf1d8ddc8c80f323ebc4 from apache/flink:master.

CVSS 3.1 · 7.5 High EPSS 49.4% KEV · Not listed
Vendors
Apache Redhat
Products
Flink Camel Quarkus Integration and 1 more
CVE-2020-1960

apache-flink: JMX information disclosure vulnerability

A vulnerability in Apache Flink (1.1.0 to 1.1.5, 1.2.0 to 1.2.1, 1.3.0 to 1.3.3, 1.4.0 to 1.4.2, 1.5.0 to 1.5.6, 1.6.0 to 1.6.4, 1.7.0 to 1.7.2, 1.8.0 to 1.8.3, 1.9.0 to 1.9.2, 1.10.0) where, when running a process with an enabled JMXReporter, with a port configured via metrics.reporter.reporter_name>.port, an attacker with local access to the machine and JMX port can execute a man-in-the-middle attack using a specially crafted request to rebind the JMXRMI registry to one under the attacker's control. This compromises any connection established to the process via JMX, allowing extraction of credentials and any other transferred data.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
Vendors
Apache Redhat
Products
Flink Jboss Fuse