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CVE-2026-23687 is an XML Signature Wrapping vulnerability in SAP NetWeaver Application Server ABAP and ABAP Platform, specifically affecting SAML response validation in NetWeaver’s SAML Service Provider. The flaw stems from improper verification of cryptographic signatures, where the platform validates the signature over one XML element while application logic consumes identity information from a different element. In the documented attack pattern, a valid signed assertion can be relocated into a Signature/Object element and a tampered outer assertion supplied, allowing the XML signature to remain valid while modified identity data is processed. An authenticated attacker with normal privileges can obtain a valid signed message and submit a modified signed XML document to the verifier, potentially causing acceptance of falsified identity information.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A related earlier XML Signature Wrapping vulnerability in SAP NetWeaver Application Server ABAP / ABAP Platform with the same root cause and similar attack pattern as CVE-2026-44748.
An XML Signature Wrapping vulnerability in SAP NetWeaver AS ABAP / ABAP Platform that can enable signature-manipulation and undermine trust decisions in XML-based workflows.
XML Signature Wrapping issue in SAP NetWeaver trust verification that can allow modified signed XML documents to be accepted, potentially enabling identity tampering and unauthorized access.
An XML signature verification weakness in SAP NetWeaver Application Server ABAP / ABAP Platform that could allow a low-privileged authenticated user to tamper with signed XML documents, potentially leading to acceptance of modified identity information and unauthorized access to sensitive data.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.