CVE-2020-17519

HIGH7.5⚠ KEVEPSS 94.3%

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

Published: 1/6/2021Modified: 10/22/2025Added to CISA KEV: 5/23/2024
Also known as:GHSA-395w-qhqr-9fr6BIT-flink-2020-17519

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 packages (3)

CVSS scores

SourceVersionSeverityVector
osvCVSS 3.1HIGH7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:H

References (33)