Is CVE-2026-88047 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-88047 being exploited in the wild.

How severe is CVE-2026-88047?

High severity, with a CVSS score of 7.8, published 10 September 2026.

Which products and versions are affected?

Tesseract OCR Tesseract 5.5.3 and earlier.

Is there a fix for CVE-2026-88047?

A patch was published on 2026-08-25: Commit 1bda507 addresses the vulnerability Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-88047 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-88047?

Check whether you run Tesseract OCR Tesseract at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-88047: Tesseract stack buffer overflow in ReadNormProtos

CVE-2026-88047 · Severity: high · CVSS 7.8 · Published 2026-09-10

Tesseract is an open-source OCR (optical character recognition) engine used to extract text from images and documents. A vulnerability in its model-loading code allows attackers to crash the application or potentially execute arbitrary code by providing a malicious trained model file (.traineddata). This affects any application using Tesseract to process untrusted document models.

Technologies: Tesseract OCR Tesseract. Vendors: Tesseract OCR.

Quick answers

Is CVE-2026-88047 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-88047 being exploited in the wild.
How severe is CVE-2026-88047?: High severity, with a CVSS score of 7.8, published 10 September 2026.
Which products and versions are affected?: Tesseract OCR Tesseract 5.5.3 and earlier.
Is there a fix for CVE-2026-88047?: A patch was published on 2026-08-25: Commit 1bda507 addresses the vulnerability Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-88047 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-88047?: Check whether you run Tesseract OCR Tesseract at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a stack buffer overflow (CWE-121) in Classify::ReadNormProtos (src/classify/normmatch.cpp:193) where the NORMPROTO component of a .traineddata file is parsed. The function uses std::istream::operator>>(char*) to extract a whitespace-delimited token into a fixed 61-byte stack buffer without setting a stream width limit. Since the line buffer allows up to 99 characters and the destination buffer is only 61 bytes, a token longer than 60 characters causes up to 39 bytes of attacker-controlled data to overflow the stack buffer during TessBaseAPI::Init. This corrupts adjacent stack memory (return addresses, frame pointers, adjacent variables), resulting in denial of service or potential control-flow hijacking. Builds using Apple's libc++ C++20 bounded array overload are incidentally protected; typical libstdc++ builds remain vulnerable. The fix (applied in commit 1bda507, patched in version 5.5.4) adds std::setw() to bound the extraction to the buffer size.

Affected products

Tesseract OCR Tesseract 5.5.3 and earlier

Timeline

2026-08-31: disclosed
2026-08-25: patched: Commit 1bda507 addresses the vulnerability
2026-09-10: advisory: CVE-2026-88047 published

References

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