CVE-2026-59305Network attack vector

Unspecified impact via improper partition interceptor

Published Aug 27, 2026 · Updated Aug 27, 2026

Improper interceptor handling in Spring Cloud Stream allows attackers to cause unspecified impact while sending partitioned messages. Spring states that a partition interceptor can be added improperly during message sending but has not published the affected class, method, or erroneous operation. The published vector requires network reachability, high privileges, and user interaction; no more specific consequence is documented.

CVSS severity3.1
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper interceptor handling in Spring Cloud Stream allows attackers to cause unspecified impact while sending partitioned messages. Spring states that a partition interceptor can be added improperly during message sending but has not published the affected class, method, or erroneous operation. The published vector requires network reachability, high privileges, and user interaction; no more specific consequence is documented.

The record

CVE
CVE-2026-59305
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring Cloud Stream
Classifications
Unavailable
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.2.0 <=4.2.6
  2. Affected versionversion=4.3.0 <=4.3.3
  3. Affected versionversion=5.0.0 <=5.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Spring · Spring Cloud Streamversion=4.2.0 <=4.2.6; version=4.3.0 <=4.3.3; version=5.0.0 <=5.0.2

Published CVSS scores

3.1SpringCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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