CriticalCVE-2026-44748

    XML Signature Wrapping in SAML Authentication in SAP NetWeaver AS ABAP and ABAP Platform (CVE-2026-44748)

    Published Last modified Sources: SAP Note, CVE.org

    What is affected, what to do

    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 leading to unauthorized access to sensitive user data and potential disruption of normal system usage.

    The available sources name no fixed version. Check the vendor guidance in the references below.

    Affected
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 702..SAP_BASIS 702
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 731..SAP_BASIS 731
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 740..SAP_BASIS 740
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 750..SAP_BASIS 750
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 751..SAP_BASIS 751
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 752..SAP_BASIS 752
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 753..SAP_BASIS 753
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 754..SAP_BASIS 754
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 755..SAP_BASIS 755
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 756..SAP_BASIS 756
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 757..SAP_BASIS 757
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 758..SAP_BASIS 758
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 816..SAP_BASIS 816
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 918..SAP_BASIS 918
    • SAP NetWeaver AS ABAP and ABAP Platform eq SAP_BASIS 919..SAP_BASIS 919

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    9.9

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    9.9

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: SAP Note, CVE.org

    0.3 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 23.8

    Show all metrics
    Severity
    Critical
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    72.90 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    9.9 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    9.9
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.3 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    23.8
    Elevated — this CVE ranks above at least 10% of all CVEs scored today.
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-347

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    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 leading to unauthorized access to sensitive user data and potential disruption of normal system usage. This causes a high impact on confidentiality, integrity and availability of the application.

    Source: sap_note, CVE.org (MITRE), NVD (NIST), cvelistv5

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    SAP_SESAP NetWeaver AS ABAP and ABAP Platform
    • SAP_BASIS 731
    • SAP_BASIS 919
    • SAP_BASIS 755
    • SAP_BASIS 816
    • SAP_BASIS 753
    • SAP_BASIS 702
    • SAP_BASIS 758
    • SAP_BASIS 740
    • SAP_BASIS 918
    • SAP_BASIS 751
    • SAP_BASIS 756
    • SAP_BASIS 757
    • SAP_BASIS 750
    • SAP_BASIS 754
    • SAP_BASIS 752
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    Vendors and products

    Weakness classes (CWE)

    • CWE-347Improper Verification of Cryptographic Signature

      Base

      The product does not verify, or incorrectly verifies, the cryptographic signature for data.

      Entry at MITRE CWE-347

    References & sources

    Reanalysis & status changes

    Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

    1. CVE Translatednvd@nist.gov

      • Translation: after Title: SAP NetWeaver AS ABAP and ABAP Platform, Description: SAP NetWeaver Servidor de Aplicaciones ABAP y Plataforma ABAP permite a un atacante autenticado con privilegios normales obtener un mensaje firmado válido y enviar documentos XML firmados modificados al verificador. Esto puede resultar en la aceptación de información de identidad manipulada, lo que lleva a un acceso no autorizado a datos de usuario sensibles y una posible interrupción del uso normal del sistema. Esto causa un alto impacto en la confidencialidad, integridad y disponibilidad de la aplicación.
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    Badge preview for CVE-2026-44748
    <a href="https://intel.neosec.eu/en/cve/CVE-2026-44748"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-44748.svg?lang=en" alt="CVE-2026-44748 – NEOSEC Intel" height="20"></a>