CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Apache Flink Improper Access Control Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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
apache: flink
References10
- lists.apache.org/thread.html/r4e1b72bfa789ea5bc20b8afe56119200e… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r88b55f3ebf1f8f4e1cc61f030252aaef4… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r88f427865fb6aa6e6378efe07632a1906… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r4e1b72bfa789ea5bc20b8afe56119200e… Mailing ListVendor Advisory
- lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68… Mailing ListVendor Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 98% percentile: 100 · as of 2 November 2026
- CWE
- CWE-552
Could this be exploited in your environment?
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