CVE-2026-59278Network attack vector

SSRF via untrusted InetAddress header deserialization

Published Aug 27, 2026 · Updated Aug 27, 2026

SSRF in Spring for Apache Kafka allows remote attackers to trigger server-side DNS lookups via crafted Kafka message headers. JsonKafkaHeaderMapper and DefaultKafkaHeaderMapper trust java.net types by default, so an injected InetAddress type reaches Jackson, which calls InetAddress.getByName during deserialization. Any external Kafka producer able to write to a consumed topic can trigger the lookup in the default @KafkaListener configuration, enabling outbound DNS requests and associated limited data access or modification.

CVSS severity6.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Spring for Apache Kafka allows remote attackers to trigger server-side DNS lookups via crafted Kafka message headers. JsonKafkaHeaderMapper and DefaultKafkaHeaderMapper trust java.net types by default, so an injected InetAddress type reaches Jackson, which calls InetAddress.getByName during deserialization. Any external Kafka producer able to write to a consumed topic can trigger the lookup in the default @KafkaListener configuration, enabling outbound DNS requests and associated limited data access or modification.

The record

CVE
CVE-2026-59278
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring for Apache Kafka
Classifications
CWE-918
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.8.12
  2. Affected versionversion=2.9.0 <=2.9.14
  3. Affected versionversion=3.0.0 <=3.3.16
  4. Affected versionversion=4.0.0 <=4.0.6
  5. Affected versionversion=4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Spring for Apache Kafkaversion=0 <=2.8.12; version=2.9.0 <=2.9.14; version=3.0.0 <=3.3.16; version=4.0.0 <=4.0.6; version=4.1.0

Published CVSS scores

6.5SpringCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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