CVE-2026-41727: spring spring for apache kafka Improper Input Validation
Vulnerability summary
CVE-2026-41727 is a medium (CVSS 6.5) Improper Input Validation vulnerability in spring spring for apache kafka. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 34.9% of scored vulnerabilities.
Timeline
- 09-06-2026PublishedVulnerability first disclosed.
- 27-06-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · MavenEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
+0.18 pp
From 0.24% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Org.springframework.kafka1 product
- spring-kafka≥ 4.0.0, < 4.0.6 | ≥ 3.3.0, < 3.3.16 | ≥ 3.2.0, ≤ 3.2.13 | ≥ 2.9.0, ≤ 2.9.13 | ≤ 2.8.11
Spring1 product
- spring for apache kafka≥ 4.0.0, < 4.0.5.1 | ≥ 3.3.0, < 3.3.15.1 | ≥ 3.2.0, < 3.2.14 | ≥ 2.9.0, < 2.9.14 | ≥ 2.8.0, < 2.8.12
Vmware1 product
- spring_for_apache_kafka≥ 2.8.0, < 2.8.12 | ≥ 2.9.0, < 2.9.14 | ≥ 3.2.0, < 3.2.14 | ≥ 3.3.0, < 3.3.15.1 | ≥ 4.0.0, < 4.0.5.1
3 vendors · 3 products
