CVE-2026-73066: Tesseract-Ocr Tesseract

Medium severity, CVSS 6.8. EPSS: 0.1% chance of exploitation in the next 30 days.

Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause an unchecked signed integer multiplication in Convolve::DeSerialize in src/lstm/convolve.cpp to wrap the convolution output-channel count, undersizing the forward-pass output buffer while writes use the unwrapped element count and causing a heap out-of-bounds write during OCR recognition. This issue is fixed in version 5.5.3.

Affected products

• Tesseract-Ocr Tesseract: before 5.5.3 (fixed in 5.5.3)

Published 2026-08-11. Last modified 2026-09-09.