RCE in 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 users with query submission privileges to execute arbitrary code on TaskManagers via maliciously crafted SQL queries. The vulnerability affects JSON functions (1.15.0+) and LIKE expressions with ESCAPE clauses (1.17.0+). User-controlled strings are interpolated into generated Java code without proper escaping, allowing attackers to break out of string literals and inject arbitrary expressions. Users are recommended to upgrade to either version 1.20.4, 2.0.2, 2.1.2 or 2.2.1, which fixes this issue.
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.004 (31.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Apache Flink — versions 2.2.0
- Apache Software Foundation Flink — versions 1.15.0
Weakness classification (CWE)
References
- security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-35194?
- CVE-2026-35194 is a high-severity vulnerability in Apache Flink, classified under Code Injection. CVSS score: 8.1/10. Published 2026-05-15.
- How severe is CVE-2026-35194?
- High severity. CVSS v3 base score is 8.1 out of 10.