CVE-2026-11923Network attack vector

Authentication bypass via weak cryptographic validation

Published Aug 12, 2026 · Updated Aug 12, 2026

Improper authentication in IBM Verify Identity Access Reverse Proxy 11.0 through 11.0.3 allows remote attackers to bypass validation. The Reverse Proxy performs weaker-than-expected cryptographic validation on user-supplied data, but IBM has not disclosed the validation operation or error. Security Verify Access and its container edition 10.0 through 10.0.9.2 and Verify Identity Access Container 11.0 through 11.0.3 are also affected only in certain configurations; exploitation permits data disclosure or modification, not service interruption.

CVSS severity7.4
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in IBM Verify Identity Access Reverse Proxy 11.0 through 11.0.3 allows remote attackers to bypass validation. The Reverse Proxy performs weaker-than-expected cryptographic validation on user-supplied data, but IBM has not disclosed the validation operation or error. Security Verify Access and its container edition 10.0 through 10.0.9.2 and Verify Identity Access Container 11.0 through 11.0.3 are also affected only in certain configurations; exploitation permits data disclosure or modification, not service interruption.

The record

CVE
CVE-2026-11923
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
IBM
Product
IBM Security Verify Access
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=10.0 <=10.0.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Security Verify Accessversion=10.0 <=10.0.9.2
IBM · IBM Security Verify Access Containerversion=10.0 <=10.0.9.2
IBM · IBM Verify Identity Access Containerversion=11.0 <=11.0.3
IBM · IBM Verify Identity Accessversion=11.0 <=11.0.3

Published CVSS scores

7.4IBM CorporationCVSS:3.1/AV:N/AC:H/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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