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CVE-2026-88047

7.8, high

Tesseract-ocr tesseract Stack-based Buffer Overflow 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
0.1% higher than 1.4% of scored CVEs
Exploitation
No public evidence
Published
10 Sept 2026a month ago

Description

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, Classify::ReadNormProtos in src/classify/normmatch.cpp parses the NORMPROTO component of a .traineddata file and uses std::istream::operator>>(char*) to extract a whitespace-delimited token into a fixed 61-byte stack buffer without setting a stream width. The 100-byte line buffer can carry a token of up to 99 characters, so a token longer than 60 characters writes up to 39 attacker-controlled bytes past the buffer during TessBaseAPI::Init of the legacy engine, causing stack corruption, denial of service, and potentially control-flow hijacking on affected standard-library implementations. Builds using Apple's libc++ C++20 bounded array overload are incidentally protected, while typical libstdc++ builds remain affected. No fixed release is available as of this review.

Details

Vendor
Tesseract-ocr
Product
tesseract
Weakness
CWE-121 (opens in a new tab)
Status
Analyzed
Updated
14 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

Patches and fixes 1

Advisories 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-2026-88048 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
  • CVE-2026-88053 Tesseract-ocr tesseract Out-of-Bounds Write Vulnerability EPSS 0.2% 7.8, high

Beyond this page

Is CVE-2026-88047 in your network?

This page tells you how dangerous CVE-2026-88047 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.