PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-41727 Spring CVE debrief

CVE-2026-41727 is a medium-severity vulnerability in Spring Kafka's retry topic infrastructure. 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. This issue affects Spring for Apache Kafka versions 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, and 2.8.0 through 2.8.11.

Vendor
Spring
Product
Spring for Apache Kafka
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-07-17
Advisory published
2026-06-10
Advisory updated
2026-07-17

Who should care

Users of Spring for Apache Kafka versions 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, and 2.8.0 through 2.8.11 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by insufficient validation of user-controlled header values in Spring Kafka's retry topic infrastructure. A producer can send a record with a crafted retry_topic-attempts header, which can cause the retry topic router to misidentify the message's position in the retry sequence.

Defensive priority

medium

Recommended defensive actions

  • Upgrade to a non-vulnerable version of Spring for Apache Kafka.
  • Apply patches or updates provided by the vendor.
  • Restrict access to the affected systems and networks.

Evidence notes

The CVE-2026-41727 vulnerability was published on [cvePublishedAt] and last modified on [cveModifiedAt]. The CVSS score is 6.5, and the severity is MEDIUM.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41727 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41727

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41727 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41727

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.