CVE-2025-64733 in Affinity
Summary
by MITRE • 03/17/2026
An out-of-bounds read vulnerability exists in the EMF functionality of Canva Affinity. By using a specially crafted EMF file, an attacker could exploit this vulnerability to perform an out-of-bounds read, potentially leading to the disclosure of sensitive information.
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Analysis
by VulDB Data Team • 03/21/2026
The vulnerability identified as CVE-2025-64733 represents a critical out-of-bounds read flaw within the EMF (Enhanced Metafile) handling component of Canva Affinity software. This issue manifests when the application processes specially crafted EMF files that contain malformed data structures or improperly sized arrays. The vulnerability stems from inadequate input validation and bounds checking mechanisms within the EMF parsing logic, allowing an attacker to manipulate memory access patterns that extend beyond allocated buffer boundaries.
The technical implementation of this vulnerability places the affected system at risk through improper memory management during EMF file processing. When Canva Affinity encounters an EMF file with maliciously constructed data, the parsing routine fails to validate array indices or buffer limits before accessing memory locations. This flaw typically occurs in the context of raster image processing where EMF files contain embedded graphics instructions that must be interpreted and rendered. The out-of-bounds read can potentially expose adjacent memory segments containing sensitive data such as stack contents, heap information, or other application state data that may include credentials, session tokens, or proprietary information.
From an operational perspective, this vulnerability creates significant risk for end users and organizations utilizing Canva Affinity for design work and collaborative projects. Attackers could leverage this flaw through social engineering campaigns distributing malicious EMF files via email attachments, file sharing platforms, or compromised websites. The exploitation process would likely require minimal user interaction beyond opening the crafted file, making it particularly dangerous in enterprise environments where users may encounter such files through legitimate business communications. The potential information disclosure could lead to credential compromise, intellectual property theft, or serve as a foothold for further attacks within network infrastructure.
The vulnerability aligns with CWE-129, which addresses improper validation of array indices, and relates to ATT&CK technique T1203, which covers exploitation of remote services through file format vulnerabilities. Organizations should implement immediate mitigations including restricting EMF file handling capabilities, deploying network-based intrusion detection systems to monitor for suspicious file transfers, and ensuring all users receive security updates from Canva. Additionally, security teams should consider implementing sandboxing mechanisms for processing untrusted EMF files, regular vulnerability assessments of third-party libraries, and user education regarding suspicious file attachments. The remediation approach should prioritize patch management for the affected software version, while maintaining continuous monitoring for similar vulnerabilities in other vector-based file processing components within the application ecosystem.