CVE-2019-12399 Exposure of Sensitive Information to an Unauthorized Actor in Apache Kafka
Attackers can retrieve plaintext secrets from Kafka Connect task configurations when externalized secret variables are used in substrings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-12399?
CVE-2019-12399 is a high-severity vulnerability in Oracle Banking Platform, published on 14 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
When Connect workers in Apache Kafka 2.0.0, 2.0.1, 2.1.0, 2.1.1, 2.2.0, 2.2.1, or 2.3.0 are configured with one or more config providers, and a connector is created/updated on that Connect cluster to use an externalized secret variable in a substring of a connector configuration property value, then any client can issue a request to the same Connect cluster to obtain the connector's task configuration and the response will contain the plaintext secret rather than the externalized secrets variables.
Weakness: CWE-319
Which versions are affected by CVE-2019-12399?
8 open source packages ship an affected version, including org.apache.kafka:kafka. It affects 13 products.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.kafka:kafka Maven | From 2.0.0 | 2.0.2 |
org.apache.kafka:kafka Maven | From 2.0.0 | 2.0.2 |
org.apache.kafka:kafka Maven | From 2.1.0 | 2.1.2 |
org.apache.kafka:kafka Maven | From 2.1.0 | 2.1.2 |
org.apache.kafka:kafka Maven | From 2.2.0 | 2.2.2 |
org.apache.kafka:kafka Maven | From 2.2.0 | 2.2.2 |
2 more packages
org.apache.kafka:kafka Maven | From 2.3.0 | 2.3.1 |
org.apache.kafka:kafka Maven | From 2.3.0 | 2.3.1 |
Products include Apache Kafka, Oracle Banking Corporate Lending Process Management, Oracle Banking Credit Facilities Process Management, Oracle Banking Liquidity Management, Oracle Banking Payments, Oracle Banking Platform and 7 more.
How do I fix CVE-2019-12399?
Upgrade org.apache.kafka:kafka to a fixed version for your release line: 2.0.2, 2.1.2, 2.2.2 or 2.3.1.
Is CVE-2019-12399 being exploited?
There is no known exploitation of CVE-2019-12399 in the wild and no public exploit code.
Other vulnerabilities in Oracle Banking Platform
- CVE-2026-33557 Apache Kafka: Missing JWT token validation in OAUTHBEARER authentication
- CVE-2025-27818 Apache Kafka: Possible RCE attack via SASL JAAS LdapLoginModule configuration
- CVE-2018-17196 Improper Input Validation in Apache Kafka
- CVE-2026-35554 Apache Kafka Clients: Kafka Producer Message Corruption and Misrouting via Buffer Pool Race Condition
- CVE-2025-27817 Apache Kafka Client: Arbitrary file read and SSRF vulnerability
Sources
Also known as GHSA-6jmf-mxwf-r3jc.