Medium severity · published Aug 27, 2026
CVE-2026-59277
Spring Security InetAddressMatchers Incomplete Internal Network Classification
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
Spring Security's InetAddressMatchers utility provides matchInternal() and matchExternal() builders for constructing an InetAddressMatcher that classifies a given IP address as belonging to an internal (private) or external (public) network.
Spring Security 7.1.0
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SS
Spring Security · Spring
7.1.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59277
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59277
Vendor Advisory
https://spring.io/security/cve-2026-59277
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