CVE-2026-45048Network attack vectorHinoki check available

Authenticated session hijacking via unchecked session queries

Published Sep 15, 2026 · Updated Sep 15, 2026

Improper authorization in OpenAM 16.0.6 and earlier allows remote authenticated users to hijack other users' active sessions. SessionRequestHandler returns active session credentials for an attacker-supplied identity identifier without enforcing session ownership or privilege checks. Exploitation requires a valid low-privilege session, knowledge of the target identity identifier, an exposed session management endpoint, and stateful session storage.

CVSS severity8.5
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authorization in OpenAM 16.0.6 and earlier allows remote authenticated users to hijack other users' active sessions. SessionRequestHandler returns active session credentials for an attacker-supplied identity identifier without enforcing session ownership or privilege checks. Exploitation requires a valid low-privilege session, knowledge of the target identity identifier, an exposed session management endpoint, and stateful session storage.

The record

CVE
CVE-2026-45048
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Open Identity Platform
Product
OpenAM
Classifications
CWE-200, CWE-285, T1550.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=< 16.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open Identity Platform · OpenAMversion=< 16.1.1

Published CVSS scores

8.5GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-285Improper Authorization
T1550.004Use Alternate Authentication Material Web Session Cookie

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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