SSRF in Apache Kafka Client



| Updated: 2025-07-03
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-27817
CWE-ID CWE-918
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Apache Kafka
Client/Desktop applications / Messaging software

Vendor Apache Foundation

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU112146

Risk: High

CVSSv4.0: 7.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/U:Amber]

CVE-ID: CVE-2025-27817

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in Apache Kafka Client. The application accepts configuration data for setting the SASL/OAUTHBEARER connection with the brokers, including "sasl.oauthbearer.token.endpoint.url" and "sasl.oauthbearer.jwks.endpoint.url". A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Kafka: 3.1.0 - 3.9.0

CPE2.3 External links

https://lists.apache.org/thread/6cm2d0q5126lp7w591wt19211s5xxcsm


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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