Critical severity · published Aug 27, 2026
CVE-2026-59313
Server Sent Event stream corruption in Spring MVC functional web framework
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
Spring MVC applications using the functional web framework are vulnerable to stream corruption when using Server-Sent Events (SSE).
Spring Framework 7.0.0 - 7.0.8
Spring Framework 6.2.0 - 6.2.19
Spring Framework 6.1.0 - 6.1.28
Spring Framework 6.0.0 - 6.0.30
Spring Framework 5.3.0 - 5.3.49
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SF
Spring Framework · Spring
7.0.0 through 7.0.8; 6.2.0 through 6.2.19; 6.1.0 through 6.1.28; 6.0.0 through 6.0.30; 5.3.0 through 5.3.49 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59313
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59313
Vendor Advisory
https://spring.io/security/cve-2026-59313
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