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      <title>CVE-2026-41727 — In Spring for Apache Kafka, forged retry topic headers subvert retry routing and backoff behavior</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-41727</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Spring for Apache Kafka&lt;/p&gt;
&lt;p&gt;Spring Kafka&amp;#39;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.&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Spring for Apache Kafka&lt;/p&gt;
&lt;p&gt;Spring Kafka&amp;#39;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.&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
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