CVE-2026-11937Network attack vectorHinoki check available

Authenticated service interruption via reverse-proxy use-after-free

Published Aug 12, 2026 · Updated Aug 12, 2026

Use-after-free in IBM Verify Identity Access Reverse Proxy allows remote authenticated users to interrupt service in certain configurations. The reverse proxy accesses memory after freeing it, but IBM has not disclosed the affected code path, request sequence, or configuration prerequisite. Exploitation requires network access with low privileges and a high-complexity trigger; the published impact is limited to reduced availability, with no data disclosure or modification.

CVSS severity3.1
Low
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in IBM Verify Identity Access Reverse Proxy allows remote authenticated users to interrupt service in certain configurations. The reverse proxy accesses memory after freeing it, but IBM has not disclosed the affected code path, request sequence, or configuration prerequisite. Exploitation requires network access with low privileges and a high-complexity trigger; the published impact is limited to reduced availability, with no data disclosure or modification.

The record

CVE
CVE-2026-11937
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
IBM
Product
IBM Security Verify Access
Classifications
CWE-416, T1499
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

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

3.1IBMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

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

Weakness, pattern, technique

CWE-416Use After Free
T1499Endpoint Denial of Service

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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