Answer in brief
CVE-2026-41727 records a Medium severity (CVSS 6.5) vulnerability in In Spring for Apache Kafka, forged retry topic headers subvert retry routing and backoff behavior. The current sources do not mark it as known exploited. The current feed maps Spring/Spring for Apache Kafka (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Spring/Spring for Apache Kafka (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Spring/Spring for Apache Kafkageneric | >=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 | 4.0.5.1, 3.3.15.1, 3.2.14, 2.9.14, 2.8.12 |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-41727 records a Medium severity (CVSS 6.5) vulnerability in In Spring for Apache Kafka, forged retry topic headers subvert retry routing and backoff behavior. The current sources do not mark it as known exploited. The current feed maps Spring/Spring for Apache Kafka (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Spring/Spring for Apache Kafka (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Spring/Spring for Apache Kafkageneric | >=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 | 4.0.5.1, 3.3.15.1, 3.2.14, 2.9.14, 2.8.12 |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.