CVE-2026-88050

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, RecodedCharID::DeSerialize in src/ccutil/unicharcompress.h validates length_ but accepts negative code_ values from a crafted .traineddata recoder component. UnicharCompress::ComputeCodeRange in src/ccutil/unicharcompress.cpp can consequently produce code_range_ equal to zero, after which SetupDecoder indexes is_valid_start_ with the negative code on a size-zero vector. The resulting out-of-bounds bit write uses a large wrapped index and reliably causes a wild-address crash or allocation failure on the default LSTM engine. No fixed release is available as of this review.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/tesseract-ocr/tesseract/commit/c94a5532ee04db5a4919542832fd94caee5ea58f	Patch
https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7v9h-3q3m-w68g	Vendor Advisory
https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7v9h-3q3m-w68g	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:tesseract-ocr:tesseract_ocr:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-09-10 17:17

Updated : 2026-09-14 20:02

NVD link : CVE-2026-88050

Mitre link : CVE-2026-88050

CVE.ORG link : CVE-2026-88050

JSON object : View

Products Affected

tesseract-ocr

tesseract_ocr

CWE

CWE-787

Out-of-bounds Write

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