Low severity · published Aug 27, 2026
CVE-2026-59303
Dynamic destination cache size is not properly bound in Spring Cloud Stream
3.8
CVSS
0.2%
EPSS
No
On KEV
Description
Dynamic destination cache size is not properly bound in Spring Cloud Stream.
Spring Cloud Stream 5.0.0 - 5.0.2
Spring Cloud Stream 4.3.0 - 4.3.3
Spring Cloud Stream 4.2.0 - 4.2.6
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Spring Cloud Stream · Spring
5.0.0 through 5.0.2; 4.3.0 through 4.3.3; 4.2.0 through 4.2.6 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59303
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59303
Patch
https://spring.io/security/cve-2026-59303
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