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CVE-2026-88052

7.8 · HIGH

Tesseract is an open source OCR engine.

Published Sep 10, 2026tesseract-ocrCWE-129EPSS 0.18%

Overview

CVE-2026-88052 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. No authentication or special privileges are required for exploitation.

Technical description

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, UNICHARSET::load_via_fgets in src/ccutil/unicharset.cpp trusts the declared unichar count as a loop bound and uses id as an unchecked index into the unichars vector. unichar_insert_backwards_compatible can leave the vector unchanged for an empty, duplicate, or already-encodable representation, causing id to become larger than unichars.size(). Subsequent set_* calls and the write to unichars[id].properties.enabled then write UNICHAR_PROPERTIES beyond the vector during initialization in both the default LSTM and legacy engines, causing 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/2d04d640db2e8c7e3bab2369d599343b5a8b8443GitHubgithub.com/tesseract-ocr/tesseract/security/advisories/GHSA-2hm8-q5c7-c373

How CyberStrike helps

Frequently asked questions

What is CVE-2026-88052?

CVE-2026-88052 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-2026-88052?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-88052?

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-2026-88052?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-88052 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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