CVE-2026-22747Network attack vector

User impersonation via regex-parsed certificate subject

Published Apr 22, 2026 · Updated Apr 22, 2026

Authentication bypass in Spring Security 7.0.0 through 7.0.4 allows remote authenticated users to impersonate another user via X.509. The extractor applies a CN-matching regular expression to the serialized subject DN, so embedded DN text inside another RDN can be mistaken for the username. Exploitation requires X.509 pre-authentication and a crafted certificate already accepted by a compromised trusted upstream; the result is account impersonation.

CVSS severity6.8
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Spring Security 7.0.0 through 7.0.4 allows remote authenticated users to impersonate another user via X.509. The extractor applies a CN-matching regular expression to the serialized subject DN, so embedded DN text inside another RDN can be mistaken for the username. Exploitation requires X.509 pre-authentication and a crafted certificate already accepted by a compromised trusted upstream; the result is account impersonation.

The record

CVE
CVE-2026-22747
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
Spring
Product
Spring Security
Classifications
CWE-297, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=7.0.0 <=7.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Spring · Spring Securityversion=7.0.0 <=7.0.4

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
6.8SpringCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-297Improper Validation of Certificate with Host Mismatch
T1078Valid Accounts

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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