CVE-2026-46599
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk28th percentile - higher than 28% of all known CVEs
Summary
The TIFF decoder does not limit the size of PackBits-compressed data. A maliciously crafted image can cause the decoder to decompress large amounts of data, even though the image is small in dimensions and encoded size.
Risk Assessment
An attacker could cause excessive memory or CPU usage, potentially leading to denial of service (DoS) in applications processing TIFF images.
Recommendation
Update the TIFF decoding library to a version that introduces a limit on PackBits data size (if available) or apply application-level restrictions.
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Original NVD description (English source)
The TIFF decoder does not place a limit on the size of PackBits-compressed data. A maliciously-crafted image can exploit this to cause a small image (both in terms of pixel width/height and encoded size) to make the decoder decode large amounts of compressed data.

