Improper input validation in Spring For Apache Kafka
CVE-2026-41727
Spring Kafka's retry topic infrastructure did not sufficiently validate user-controlled header values before acting on them. A producer could send a record with a crafted retry_topic-attempts header to supply an out-of-range attempt count and cause the retry topic router to misidentify where the message was in the retry sequence. Affected versions: Spring for Apache Kafka 4.0.0 through 4.0.5; 3.3.0 through 3.3.15; 3.2.0 through 3.2.13; 2.9.0 through 2.9.13; 2.8.0 through 2.8.11.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (15.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.002 · change: -0.002
Affected products
- Spring For Apache Kafka — versions 4.0.0, 3.3.0, 3.2.0
- VMware Spring For Apache Kafka
Weakness classification (CWE)
References
- spring.io/security/cve-2026-41727 (Third Party Advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-41727?
- CVE-2026-41727 is a medium-severity vulnerability in Spring For Apache Kafka, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-06-10.
- How severe is CVE-2026-41727?
- Medium severity. CVSS v3 base score is 6.5 out of 10.