CVE-2026-59277Network attack vectorHinoki check available

Access control bypass via any-local address misclassification

Published Aug 27, 2026 · Updated Aug 27, 2026

Access control bypass in Spring Security 7.1.0 allows remote attackers to evade IP-based restrictions with any-local addresses. InetAddressMatchers omits 0.0.0.0 and :: from its internal-address set, so matchExternal() labels them public and matchInternal() rejects them. Exploitation requires an application to use either builder for access control and treat an any-local address as internal; the bypass exposes resources intended only for local access.

CVSS severity3.7
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Access control bypass in Spring Security 7.1.0 allows remote attackers to evade IP-based restrictions with any-local addresses. InetAddressMatchers omits 0.0.0.0 and :: from its internal-address set, so matchExternal() labels them public and matchInternal() rejects them. Exploitation requires an application to use either builder for access control and treat an any-local address as internal; the bypass exposes resources intended only for local access.

The record

CVE
CVE-2026-59277
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring Security
Classifications
CWE-693, T1190
Attack vector
network
Privileges
unauthenticated

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=7.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Spring Securityversion=7.1.0

Published CVSS scores

3.7SpringCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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