A possible arbitrary file read and SSRF vulnerability has been identified in Apache Kafka Client. Apache Kafka Clients accept configuration data for setting the SASL/OAUTHBEARER connection with the brokers, including "sasl.oauthbearer.token.endpoint.url" and "sasl.oauthbearer.jwks.endpoint.url". Apache Kafka allows clients to read an arbitrary file and return the content in the error log, or sending requests to an unintended location. In applications where Apache Kafka Clients configurations can be specified by an untrusted party, attackers may use the "sasl.oauthbearer.token.endpoint.url" and "sasl.oauthbearer.jwks.endpoint.url" configuratin to read arbitrary contents of the disk and environment variables or make requests to an unintended location. In particular, this flaw may be used in Apache Kafka Connect to escalate from REST API access to filesystem/environment/URL access, which may be undesirable in certain environments, including SaaS products. 
Since Apache Kafka 3.9.1/4.0.0, we have added a system property ("-Dorg.apache.kafka.sasl.oauthbearer.allowed.urls") to set the allowed urls in SASL JAAS configuration. In 3.9.1, it accepts all urls by default for backward compatibility. However in 4.0.0 and newer, the default value is empty list and users have to set the allowed urls explicitly.
                
            References
                    | Link | Resource | 
|---|---|
| https://kafka.apache.org/cve-list | Vendor Advisory | 
| http://www.openwall.com/lists/oss-security/2025/06/09/1 | Mailing List Third Party Advisory | 
Configurations
                    History
                    11 Jul 2025, 16:58
| Type | Values Removed | Values Added | 
|---|---|---|
| First Time | Apache kafka Apache | |
| CPE | cpe:2.3:a:apache:kafka:*:*:*:*:*:*:*:* | |
| References | () https://kafka.apache.org/cve-list - Vendor Advisory | |
| References | () http://www.openwall.com/lists/oss-security/2025/06/09/1 - Mailing List, Third Party Advisory | 
10 Jun 2025, 16:15
| Type | Values Removed | Values Added | 
|---|---|---|
| Summary | 
 | |
| CWE | CWE-918 | |
| CVSS | v2 : v3 : | v2 : unknown v3 : 7.5 | 
10 Jun 2025, 08:15
| Type | Values Removed | Values Added | 
|---|---|---|
| New CVE | 
Information
                Published : 2025-06-10 08:15
Updated : 2025-07-11 16:58
NVD link : CVE-2025-27817
Mitre link : CVE-2025-27817
CVE.ORG link : CVE-2025-27817
JSON object : View
Products Affected
                apache
- kafka
CWE
                
                    
                        
                        CWE-918
                        
            Server-Side Request Forgery (SSRF)
