Login Request a demo
Medium severity · published Jun 1, 2026
CVE-2026-40989
Self Routing guard bypassed via function composition
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
Under infinite recursion in the routing layer, request-handling can cause OOM error. Affected Spring Products and Versions: Spring Cloud Function 3.2.x: versions prior to 3.2.16 Spring Cloud Function 4.1.x: versions prior to 4.1.10 Spring Cloud Function 4.2.x: versions prior to 4.2.6 Spring Cloud Function 4.3.x: versions prior to 4.3.3 Spring Cloud Function 5.0.x: versions prior to 5.0.2 Older, unsupported versions are also affected.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
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 Function · Spring
3.2.0 before 3.2.16; 4.1.0 before 4.1.10; 4.2.0 before 4.2.6; 4.3.0 before 4.3.3; 5.0.0 before 5.0.2 · source: vendor, NVD
Affected product
SC
Spring Cloud Function
Spring
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40989
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40989
Vendor Advisory
https://spring.io/security/cve-2026-40989
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