CVE-2026-54082 in veraPDF-validation
Summary
by MITRE • 07/29/2026
veraPDF validation model is an implementation of the veraPDF validation model. From 1.25.73 until 1.30.2 and 1.31.71, veraPDF-validation contains an XML External Entity vulnerability in PDFAValidator.validate(...) and GFPDAcroForm.getdynamicRender(), where default DocumentBuilderFactory parsing of rich-text annotation or form-field values and XFA configurations in untrusted PDFs can allow local file disclosure and outbound network requests. This issue is fixed in versions 1.30.2 and 1.31.71.
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Analysis
by VulDB Data Team • 07/29/2026
The veraPDF validation model represents a critical security vulnerability that affects multiple versions of the software implementation. This vulnerability manifests as an XML External Entity processing flaw within the PDFAValidator.validate() method and GFPDAcroForm.getdynamicRender() functions. The issue stems from the default DocumentBuilderFactory parsing mechanisms that handle rich-text annotation values and XFA configurations found in PDF documents. When processing untrusted PDF files, these components fail to properly sanitize input data, creating opportunities for malicious actors to exploit the system through carefully crafted XML content.
The technical exploitation of this vulnerability occurs when the software encounters rich-text annotations or form fields containing external entity references within the XFA configuration structures. The default DocumentBuilderFactory settings allow for automatic resolution of external entities without proper validation, enabling attackers to construct malicious XML payloads that can trigger local file access and outbound network communications. This processing chain specifically affects PDF documents that contain embedded XFA forms or rich-text annotations where the parsing logic does not adequately restrict external resource access. The vulnerability directly relates to CWE-611, which addresses improper restriction of XML external entity references in applications.
Operational impact assessment reveals significant risks for organizations relying on veraPDF validation for document processing and compliance verification. Systems processing untrusted PDF documents become susceptible to unauthorized local file disclosure, potentially exposing sensitive system files, configuration data, or user information stored locally. Additionally, the vulnerability enables outbound network requests that could facilitate data exfiltration or command and control communications, creating potential pathways for further compromise. The attack surface expands significantly when considering that many document processing environments handle sensitive corporate or personal data through PDF validation workflows.
Mitigation strategies should prioritize immediate upgrade to versions 1.30.2 or 1.31.71 where the vulnerability has been addressed through proper XML parsing configuration. Organizations must implement strict input validation controls that disable external entity resolution in all XML processing components handling PDF content. The ATT&CK framework categorizes this issue under T1059 for command and control communications and potentially T1074 for data staging, emphasizing the need for network monitoring and access controls. Security teams should also consider implementing sandboxed processing environments for untrusted PDF documents and establish comprehensive logging of XML parsing activities to detect potential exploitation attempts. Regular vulnerability assessments of document processing pipelines remain essential to prevent similar issues in related components.