Heap Corruption Vulnerability in Tesseract OCR Engine
CVE-2026-88048

8.6HIGH

Key Information:

Vendor

Tesseract-ocr

Status
Tesseract
Vendor
CVE Published:
10 September 2026

What is CVE-2026-88048?

The Tesseract OCR engine is vulnerable due to improper validation of deserialized layer scalars, which can lead to heap out-of-bounds read and write operations. A crafted .traineddata NT_SOFTMAX layer can exploit the discrepancies between weight-matrix dimensions, resulting in heap corruption and possible crashes. This vulnerability may also expose sensitive information or lead to uncontrolled data manipulation. As of the latest review, no patches have been released to address this issue.

Affected Version(s)

tesseract <= 5.5.3

References

https://github.com/tesseract-ocr/tesseract/security/advis...
x_refsource_CONFIRM
https://github.com/tesseract-ocr/tesseract/commit/103dc13...
x_refsource_MISC

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.