Jwt Attack
CVE-2026-23687
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate as low-privileged user
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DeliveryObtain valid signed XML message
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ExploitModify identity information in XML
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ExecutionSend tampered document to verifier
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PersistVerifier accepts forged identity
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ImpactGain unauthorized system access
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Signature verification
|
| Exploitation Conditions | Attacker must possess valid SAP NetWeaver ABAP/ABAP Platform user credentials with normal privileges. Vulnerable XML signature verification mechanism must be enabled in the application server. Target system must accept and process externally-supplied signed XML documents for identity verification. |
| Impact | CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitation no authentication required. |
| Exploit ScenarioDerived | An attacker without authentication could exploit this vulnerability to acceptance of tampered identity information, unauthorized access to sensitive us. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Sap Basis versions up to 700 is affected by improper verification of cryptographic signature (CVSS 8.8).
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability (CWE-347: Improper Verification of Cryptographic Signature) affects Sap Basis. SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated attacker with normal privileges to obtain a valid signed message and send modified signed XML documents to the verifier. This may result in acceptance of tampered identity information, unauthorized access to sensitive user data and potential disruption of normal system usage.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated attacker with normal privileges to obtain a valid signed message and send modified signed XML documents to the verifier. This may result in acceptance of tampered identity information, unauthorized access to sensitive user data and potential disruption of normal system usage.
Executive ViewAI
SAP Basis systems running version 700 and earlier are vulnerable to cryptographic signature bypass attacks that could allow unauthorized code execution or system compromise. Organizations using affected SAP versions face immediate risk of data theft, system manipulation, and operational disruption until remediation is completed.
Implement network segmentation to restrict access to affected SAP systems; deploy Web Application Firewall (WAF) rules to monitor and block suspicious cryptographic operations; enable enhanced audit logging for all signature verification processes; restrict SAP system access to authorized personnel only; disable non-essential features and interfaces until patching is available; monitor SAP security advisories closely for patch availability and apply immediately upon release.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)CVE.org
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GitHub PoC
Exploit-DB