CVE-2026-58239Network attack vector

Cross-tenant information disclosure via spoofed tenant context

Published Aug 11, 2026 · Updated Aug 11, 2026

Tenant-context spoofing in SAP Application Router before 23.0.0 allows remote attackers to read limited information from another tenant. Inbound request handling uses insufficiently validated tenant context in a security decision, so crafted requests can spoof that context. Exploitation is unauthenticated but requires high-complexity conditions outside the attacker’s full control, and the reported consequence is limited disclosure without data changes or service interruption.

CVSS severity3.7
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Tenant-context spoofing in SAP Application Router before 23.0.0 allows remote attackers to read limited information from another tenant. Inbound request handling uses insufficiently validated tenant context in a security decision, so crafted requests can spoof that context. Exploitation is unauthenticated but requires high-complexity conditions outside the attacker’s full control, and the reported consequence is limited disclosure without data changes or service interruption.

The record

CVE
CVE-2026-58239
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
SAP SE
Product
SAP Application Router
Classifications
CWE-807, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=SAP Approuter node.js package < 23.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP Application Routerversion=SAP Approuter node.js package < 23.0.0

Published CVSS scores

3.7SAP SECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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-807Reliance on Untrusted Inputs in a Security Decision
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo