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Vulnerabilities

Vulnerability · CVE-2025-27817

Apache kafka Server-Side Request Forgery (SSRF)

Published Jun 10, 2025 · catalog updated Apr 8, 2026 · Apache Software Foundation Apache Kafka Client

Patch now

CVE-2025-27817 is in the CISA known-exploited catalog. Confirm Apache Software Foundation Apache Kafka Client against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High7.5
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
68.78%
Remediation
Remediation guidance
Affected products
vendor Apache Software Foundation Apache Kafka Client 3.1.0 ≤3.9.0 · vendor Apache kafka

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Apache Software Foundation Apache Kafka Client 3.1.0 ≤3.9.03.1.0 ≤3.9.0
  • vendor Apache kafkaversion unspecified

How to fix CVE-2025-27817

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-27817 is in the CISA known-exploited catalog. Confirm Apache Software Foundation Apache Kafka Client against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with Apache Software Foundation Apache Kafka Client 3.1.0 ≤3.9.0 3.1.0 ≤3.9.0. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 68.78%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 8, 2026 · VulnCheck KEV

    Detected

    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 sendi

  2. Apr 8, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2025-27817

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-27817

    30-day exploitation probability 68.8%

    first.org
  • EUVDVulnerability recordEUVD-2025-17640

    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.jwk

    euvd.enisa.europa.eu
  • VulnCheck KEVConfirmed exploitationCVE-2025-27817

    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.jwk

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.