How severe is CVE-2020-17519?

CVE-2020-17519 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-17519 being actively exploited?

Yes. CVE-2020-17519 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-05-23, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-17519?

CVE-2020-17519 affects Apache Flink. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-17519?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2020-17519 have an EU (EUVD) identifier?

Yes. CVE-2020-17519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-0481. It is also flagged as exploited in the EUVD (since 2024-05-23).

When was CVE-2020-17519 published?

CVE-2020-17519 was published on 2021-01-05 and last updated on 2026-06-17.

CVE-2020-17519

CVE-2020-17519 is a high-severity vulnerability in Apache Flink with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-05-23). The underlying weakness is classified as CWE-552.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 98% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2024-05-23)
EU (EUVD) id: EUVD-2021-0481
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-05-23)
Weakness: CWE-552
Affected product: Apache Flink
Published: 2021-01-05
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-17519?: 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.
How severe is CVE-2020-17519?: CVE-2020-17519 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-17519 being actively exploited?: Yes. CVE-2020-17519 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-05-23, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-17519?: CVE-2020-17519 affects Apache Flink. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-17519?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2020-17519 have an EU (EUVD) identifier?: Yes. CVE-2020-17519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-0481. It is also flagged as exploited in the EUVD (since 2024-05-23).
When was CVE-2020-17519 published?: CVE-2020-17519 was published on 2021-01-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*

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