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PatchSiren cyber security CVE debrief

CVE-2026-59306 Spring CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-27T20:17:56.990Z and has not been modified since then. CVE-2026-59306 indicates a potential for deserialization of untrusted types in Spring Cloud Stream, affecting versions 5.0.0 - 5.0.2, 4.3.0 - 4.3.3, and 4.2.0 - 4.2.6. The CVSS score is 3.1, with a severity of LOW. Users should review and apply patches to mitigate the vulnerability. This vulnerability impacts users of Spring Cloud Stream, particularly those using affected versions. Operators, platform administrators, vulnerability management teams, and security teams should assess exposure and prioritize remediation based on their environment and risk profile. Evidence is limited to CVE and NVD sources. Defenders should verify affected versions and apply patches. Monitor for potential exploitation attempts with available detection tools.

Vendor
Spring
Product
Spring Cloud Stream
CVSS
LOW 3.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-27
Original CVE updated
2026-09-04
Advisory published
2026-08-27
Advisory updated
2026-09-04

Who should care

Users of Spring Cloud Stream, particularly those using affected versions (5.0.0 - 5.0.2, 4.3.0 - 4.3.3, and 4.2.0 - 4.2.6), should review and apply patches to mitigate the deserialization vulnerability. Operators, platform administrators, vulnerability management teams, and security teams should assess exposure and prioritize remediation based on their environment and risk profile.

Technical summary

CVE-2026-59306 indicates a potential for deserialization of untrusted types in Spring Cloud Stream, affecting versions 5.0.0 - 5.0.2, 4.3.0 - 4.3.3, and 4.2.0 - 4.2.6. The CVSS score is 3.1, with a severity of LOW. Users should review and apply patches to mitigate the vulnerability. Technical details are limited to CVE and NVD sources.

Defensive priority

Review and apply patches for Spring Cloud Stream deserialization vulnerability.

Recommended defensive actions

  • Review and apply patches for Spring Cloud Stream deserialization vulnerability
  • Inventory and verify affected Spring Cloud Stream versions
  • Monitor for potential exploitation attempts
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

The CVE-2026-59306 record indicates a potential for deserialization of untrusted types in Spring Cloud Stream. Affected versions include Spring Cloud Stream 5.0.0 - 5.0.2, 4.3.0 - 4.3.3, and 4.2.0 - 4.2.6. The CVSS score is 3.1, with a severity of LOW. Evidence is limited to CVE and NVD sources. Defenders should verify affected versions and apply patches. Monitor for potential exploitation attempts with available detection tools.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-59306 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-59306

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

  • CVE-2026-59306 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-59306

    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.