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CVE-2026-88053

7.8, high

Tesseract-ocr tesseract Out-of-Bounds Write Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.8, high high CVSS v3.1
EPSS, next 30 days
0.2% higher than 6.6% of scored CVEs
Exploitation
Exploit code published
Published
10 Sept 2026a month ago

Description

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, Classify::ReadIntTemplates in src/classify/intproto.cpp reads NumClassPruners, NumClasses, and NumProtoSets from the TESSDATA_INTTEMP component of a crafted .traineddata file and uses those values as loop bounds without validating them against MAX_NUM_CLASS_PRUNERS, MAX_NUM_CLASSES, and MAX_NUM_PROTO_SETS. The loops store heap pointers into fixed-capacity ClassPruners and ProtoSets arrays in INT_TEMPLATES_STRUCT and INT_CLASS_STRUCT, so an oversized count causes heap out-of-bounds pointer writes during legacy-classifier initialization before OCR begins, resulting in heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.

Details

Vendor
Tesseract-ocr
Product
tesseract
Weakness
CWE-787 (opens in a new tab)
Status
Analyzed
Updated
16 Sept 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References 2

Exploit code 1

Patches and fixes 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Tesseract-ocr CVEs

Every Tesseract-ocr CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-88047 Tesseract-ocr tesseract Stack-based Buffer Overflow Vulnerability EPSS 0.1% 7.8, high
  • CVE-2026-88048 Tesseract-ocr tesseract Out-of-Bounds Read Vulnerability EPSS 0.2% 7.1, high
  • CVE-2026-88051 Tesseract-ocr tesseract Out-of-Bounds Write Vulnerability EPSS 0.2% 7.8, high

Beyond this page

Is CVE-2026-88053 in your network?

This page tells you how dangerous CVE-2026-88053 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.