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CVE-2026-88051

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 5.5% 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, 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.

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-2026-88053 Tesseract-ocr tesseract Out-of-Bounds Write Vulnerability EPSS 0.2% 7.8, high

Beyond this page

Is CVE-2026-88051 in your network?

This page tells you how dangerous CVE-2026-88051 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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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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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 16 Oct 2026, not the live upstream state.