CVE-2026-88051

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, the callback form of GenericVector::read in src/ccutil/genericvector.h reads the independent int32 fields reserved and size_used_ from a .traineddata model without a cap or an invariant check. reserve(reserved) allocates the backing array, but the callback loop writes size_used_ elements. A crafted TESSDATA_INTTEMP component with version_id 4 or later can therefore set reserved to a small value and size_used_ to a large value when fontinfo_table_.read(fp, read_info) is called from src/classify/intproto.cpp, causing a heap out-of-bounds write of FontInfo structures, heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.

• CWE-787

• https://github.com/tesseract-ocr/tesseract/commit/56e09ca12e751623fe796ce1554ce704bffd2ef0Patch
• https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-88qp-4g94-3rf3Exploit, Mitigation, Vendor Advisory
• https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-88qp-4g94-3rf3Exploit, Mitigation, Vendor Advisory

Published

Sep 10, 2026

Last Modified

Sep 16, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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