CVE-2026-89105Network attack vector

Unauthorized access via ignored token-validator configuration

Published Oct 13, 2026 · Updated Oct 13, 2026

Authentication bypass in SAP Cloud Security Services Integration Library allows remote attackers to access apps via unintended tokens. HybridTokenAuthenticator omits constructor-supplied IAS/XSUAA configurations when creating its delegates, which instead validate bearer tokens against ambient bindings through Environments.getCurrent(). Unauthorized access requires a token accepted by those unintended bindings and an application whose explicit trust configuration differs from the ambient environment; applications using the documented ambient configuration are unaffected.

CVSS severityUnavailable
Unscored
EPSS probability0.14%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in SAP Cloud Security Services Integration Library allows remote attackers to access apps via unintended tokens. HybridTokenAuthenticator omits constructor-supplied IAS/XSUAA configurations when creating its delegates, which instead validate bearer tokens against ambient bindings through Environments.getCurrent(). Unauthorized access requires a token accepted by those unintended bindings and an application whose explicit trust configuration differs from the ambient environment; applications using the documented ambient configuration are unaffected.

The record

CVE
CVE-2026-89105
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
SAP SE
Product
SAP Cloud Security Services Integration Library
Classifications
T1550.001
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 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=>=3.6.6
  2. Affected versionversion=<4.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

SAP SE · SAP Cloud Security Services Integration Libraryversion=>=3.6.6; version=<4.1.1

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1550.001Application Access Token

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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