CVE-2026-19646Network attack vector

Open redirect via unvalidated HTTP Host header

Published Sep 10, 2026 · Updated Sep 10, 2026

Open redirect in IBM Common Licensing Agent and ART 9.0 through 9.0.0.2 allows remote attackers to redirect users to arbitrary domains. The web interface trusts an attacker-controlled HTTP Host header when constructing a redirect target instead of validating it against permitted hosts. Network access to the web interface is sufficient; a crafted request causes a trusted application URL to send users to an attacker-chosen domain.

CVSS severity9.1
Critical
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in IBM Common Licensing Agent and ART 9.0 through 9.0.0.2 allows remote attackers to redirect users to arbitrary domains. The web interface trusts an attacker-controlled HTTP Host header when constructing a redirect target instead of validating it against permitted hosts. Network access to the web interface is sufficient; a crafted request causes a trusted application URL to send users to an attacker-chosen domain.

The record

CVE
CVE-2026-19646
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
IBM
Product
IBM Common Licensing
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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=Agent 9.0
  2. Affected versionversion=Agent 9.0.0.1
  3. Affected versionversion=Agent 9.0.0.2
  4. Affected versionversion=ART 9.0
  5. Affected versionversion=ART 9.0.0.1
  6. Affected versionversion=ART 9.0.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Common Licensingversion=Agent 9.0; version=Agent 9.0.0.1; version=Agent 9.0.0.2; version=ART 9.0; version=ART 9.0.0.1; version=ART 9.0.0.2

Published CVSS scores

9.1IBM PSIRTCVSS:3.1/AV:N/AC:L/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

No sourced classifications are available.

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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