SB20260828165 - Multiple vulnerabilities in Spring for Apache Kafka

Description

This security bulletin contains information about 2 vulnerabilities.

1) Deserialization of Untrusted Data (CVE-ID: CVE-2026-59278)

CWE-ID: CWE-502 - Deserialization of Untrusted Data

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform server-side request forgery via DNS resolution.

The vulnerability exists due to unsafe deserialization of untrusted java.net types in JsonKafkaHeaderMapper and DefaultKafkaHeaderMapper when processing the spring_json_header_types message header. A remote attacker can send a specially crafted Kafka message header to perform server-side request forgery via DNS resolution.

The issue occurs in the default configuration for all @KafkaListener consumers.

2) Input validation error (CVE-ID: CVE-2026-59317)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to improper input validation in DeadLetterPublishingRecovererFactory when processing the retry_topic-original-timestamp header from an inbound ConsumerRecord during recovery. A remote user can send a malformed header value to cause a denial of service.

Exploitation can cause dead-letter publication to abort, after which the error handler seeks back to the failed offset and repeats the cycle indefinitely, stalling partition consumption.

Remediation

Install update from vendor's website.

References

• https://spring.io/security/cve-2026-59278
• https://spring.io/security/cve-2026-59317