MEDIUM 6.9 NVD
CVE-2026-88050
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, RecodedCharID::DeSerialize in src/ccutil/unicharcompress.h validates length_ but accepts n
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, RecodedCharID::DeSerialize in src/ccutil/unicharcompress.h validates length_ but accepts negative code_ values from a crafted .traineddata recoder component. UnicharCompress::ComputeCodeRange in src/ccutil/unicharcompress.cpp can consequently produce code_range_ equal to zero, after which SetupDecoder indexes is_valid_start_ with the negative code on a size-zero vector. The resulting out-of-bounds bit write uses a large wrapped index and reliably causes a wild-address crash or allocation failure on the default LSTM engine. No fixed release is available as of this review.
References
- https://github.com/tesseract-ocr/tesseract/commit/c94a5532ee04db5a4919542832fd94caee5ea58f
- https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7v9h-3q3m-w68g
- https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7v9h-3q3m-w68g
This medium severity vulnerability with a CVSS score of 6.9 was published on 2026-09-10 via NVD.
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