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CVE-2026-88053

7.8 · HIGH

Tesseract is an open source OCR engine.

Published Sep 10, 2026tesseract-ocrCWE-787EPSS 0.18%

Overview

CVE-2026-88053 is a high-severity vulnerability affecting tesseract-ocr tesseract_ocr. It was published on September 10, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from tesseract-ocr. Update tesseract_ocr to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
tesseract-ocrtesseract_ocr0Affected

References

GitHubgithub.com/tesseract-ocr/tesseract/commit/8b0574680f3b22f246ade6a4c8e3029104255c63GitHubgithub.com/tesseract-ocr/tesseract/security/advisories/GHSA-rphx-x795-5qjvGitHubgithub.com/tesseract-ocr/tesseract/security/advisories/GHSA-rphx-x795-5qjv

How CyberStrike helps

Frequently asked questions

What is CVE-2026-88053?

CVE-2026-88053 is a high-severity vulnerability affecting tesseract-ocr tesseract_ocr. It was published on September 10, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-88053?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-88053?

Check the references section for vendor advisories and patches from tesseract-ocr. Update tesseract_ocr to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-88053?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-88053 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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