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9.1 Critical

CVE-2020-17519 Apache Flink Improper Access Control Vulnerability

Active exploitation observed

· CISA KEV catalogue
Required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware campaigns Not observed so far
Weakness CWE-552

Description

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.

Affected products and versions

Product Affected versions Fixed in
Apache Flink Versions not published
flink 1.11 1.11.0 → 1.11.2 No fix stated

Other CVEs of Apache Flink

The 3 CVEs of Apache Flink →
CVE-2026-35194 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… Not rated CVE-2020-17518 Apache Flink 1.5.1 introduced a REST handler that allows you to write an uploaded file to an arbitrary location on the… Not rated
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