ZDI-26-779: (0Day) Sparx Systems Enterprise Architect XSLT Debugger XML External Entity Processing Information Disclosure Vulnerability

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Sparx Systems Enterprise Architect. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the XSLT Debugger. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the current process.

07/24/26 - ZDI attempted to report the vulnerability to the vendor via their bug report webform 07/29/26 - ZDI emailed the vendor directly requesting a secure for the report 08/06/26 - ZDI reported the case to CERT.PL’s coordinated disclosure program after receiving no vendor response 10/06/26 - CERT.PL verified the reported issue and assigned a CVE 10/15/26 - ZDI and CERT.PL coordinated the publication of the zero-day advisory

-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the product

2026-08-05 - Vulnerability reported to vendor

2026-10-16 - Coordinated public release of advisory

2026-10-16 - Advisory Updated