CVE-2026-91804
HighCVSS 7.8Summary
A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader's rendering of Circle annotations with malformed Cloudy appearance streams in specially crafted PDF files. Insufficient validation of the appearance geometry can result in memory corruption and application crashes.
Risk Assessment
A malicious PDF could cause memory corruption and application crashes, potentially resulting in data loss or disruption of operations.
Recommendation
Update Foxit PDF Editor/Reader to the latest patched version and avoid opening untrusted PDF files.
Other vulnerabilities in Foxit PDF Editor/Reader
See all- CVE-2026-91818High
A use-after-free vulnerability exists in Foxit PDF Editor/Reader's JavaScript handling of PDF annotations. Reentrant page-event processing during annotation enumeration may release the associated page object, which is subsequently accessed, resulting in an application crash.
- CVE-2026-91817Medium
A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript. Insufficient validation of string-deletion ranges can cause an integer underflow, resulting in an out-of-bounds read and application crash.
- CVE-2026-91816High
A use-after-free vulnerability exists in Foxit PDF Editor/Reader's handling of PDF annotations. Reentrant annotation deletion triggered by embedded JavaScript can cause the application to access an annotation object after it has been released, resulting in a use-after-free condition and application crash.
- CVE-2026-91815High
Foxit PDF Editor/Reader does not perform sufficient verification of the JPEG2000 image metadata in the PDF file, which leads to out-of-bounds write in the heap buffer during decoding, potentially causing the program to crash and introducing the risk of arbitrary code execution.
- CVE-2026-91814Medium
A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.
- CVE-2026-91813High
A vulnerability in Foxit PDF Editor/Reader's update mechanism allows an update package to be replaced between download and high-privilege extraction due to insufficient file locking and integrity validation. This could enable local attackers to execute arbitrary code with elevated privileges.
- CVE-2026-91812High
A vulnerability in Foxit PDF Editor/Reader's update mechanism allows man-in-the-middle attackers to bypass certificate validation and package integrity checks, potentially enabling arbitrary code execution with system privileges.
- CVE-2026-91811High
A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader's PRC parser due to insufficient validation of vertex indices in triangular fan texture meshes. Successful exploitation could result in memory corruption and an application crash.
- CVE-2026-91810Medium
A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader's handling of malformed PDF image masks. Inconsistent image metadata may cause incorrect alpha-channel processing during rendering, resulting in an out-of-bounds read and application crash.
- CVE-2026-91809High
A use-after-free vulnerability exists in Foxit PDF Editor/Reader's handling of malformed PDF form fields. Improper validation during field-name traversal may cause the application to access a released object, resulting in an application crash.
Original NVD description (English source)
A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s rendering of Circle annotations with malformed Cloudy appearance streams in specially crafted PDF files. Insufficient validation of the appearance geometry can result in memory corruption and application crashes.