# CVE-2026-88048

## Summary

- **CVE ID:** CVE-2026-88048
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-125, CWE-787
- **Published:** Sep 10, 2026
- **Last Modified:** Sep 10, 2026

## Description

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, FullyConnected::DeSerialize in src/lstm/fullyconnected.cpp does not validate the deserialized layer scalars ni_ and no_ against the weight-matrix dimensions. During FullyConnected::Forward, MatrixDotVector in src/lstm/weightmatrix.cpp writes w.dim1() results into temp_line, which is sized from no_, and reads w.dim2() minus one inputs from curr_input, which is sized from ni_. A crafted .traineddata NT_SOFTMAX layer can therefore use inconsistent dimensions to cause a heap out-of-bounds write and read on the default LSTM engine, resulting in heap corruption, a crash, information disclosure, or potentially controlled corruption. No fixed release is available as of this review.

## Affected Products

- tesseract-ocr — tesseract (<= 5.5.3)

## References

- [CNA](https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-q44c-23p6-5mw6)
- [CNA](https://github.com/tesseract-ocr/tesseract/commit/103dc134eb36411ddc6833ec20aa2c76795bd0ff)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._