High severity7.5NVD Advisory· Published Jan 5, 2021· Updated Jun 17, 2026

CVE-2020-17518

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
org.apache.flink:flink-runtimeMaven	>= 1.5.1, < 1.11.3	1.11.3

Affected products

Apache/Flink
cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
Range: >=1.5.1,<1.11.3
osv-coords2 versions
pkg:bitnami/flink pkg:maven/org.apache.flink/flink-runtime
>= 1.5.1, < 1.11.3+ 1 more
- (no CPE)range: >= 1.5.1, < 1.11.3
- (no CPE)range: >= 1.5.1, < 1.11.3
Apache Software Foundation/Apache Flinkv5
Range: Apache Flink 1.5.1 to 1.11.2

cvss	0.488
epss	0.040
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000

CVE-2020-17518

Description

AI Insight

Affected packages

Affected products

Patches

Vulnerability mechanics

References

News mentions