CVE-2026-59278

In Spring for Apache Kafka, SSRF via DNS resolution triggered by untrusted java.net types in header mapper default trusted packages

MEDIUM

6.5

CVSS Score

Published: August 27, 2026 at 05:20 AM UTC

Updated: September 1, 2026 at 04:21 PM UTC

2 products affected across 2 vendorsSpring for Apache KafkaSpring For Apache Kafka

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

JsonKafkaHeaderMapper and DefaultKafkaHeaderMapper include java.net in their default trusted packages list. When these mappers are used — which is the default configuration for all @KafkaListener consumers — an external Kafka producer can inject a java.net.InetAddress type via the spring_json_header_types message header. Spring for Apache Kafka 4.1.0 Spring for Apache Kafka 4.0.0 - 4.0.6 Spring for Apache Kafka 3.0.0 - 3.3.16 Spring for Apache Kafka 2.9.0 - 2.9.14 Spring for Apache Kafka 2.8.12 and earlier

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spring for Apache Kafka · VMware

95%

v < 2.8.132.9.0 ≤ v < 2.9.153.0.0 ≤ v < 3.3.174.0.0 ≤ v < 4.0.6.14.1.0 ≤ v < 4.1.0.1

Affected range stops below 2.8.13, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.9.15, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.3.17, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.0.6.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.1.0.1, so it looks safe — our inference, not a vendor statement

Spring For Apache Kafka · Spring

60%

v ≤ 2.8.122.9.0 ≤ v ≤ 2.9.143.0.0 ≤ v ≤ 3.3.164.0.0 ≤ v ≤ 4.0.62.9.0 3.0.0 4.0.0 4.1.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://spring.io/security/cve-2026-59278

References (1)

Vendor Advisory

Source: [email protected]

https://spring.io/security/cve-2026-59278

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMvmware

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-918

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