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CVE-2026-73067— Tesseract: Heap OOB read in the DAWG loader

Quick assessment

Affected
tesseract-ocr tesseract
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

tesseract-ocr tesseract是tesseract-ocr组织的一款光学字符识别引擎。 tesseract-ocr tesseract 5.5.3之前版本存在缓冲区错误漏洞，该漏洞源于特制的.traineddata模型通过TessBaseAPI::Init加载时未能正确处理未终止的前向边运行，导致堆越界读取，可能造成进程崩溃。

CVSS 6.7 · Medium EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
tesseract-ocr tesseract < 5.5.3 affected
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I. Basic Information for CVE-2026-73067

Vulnerability Information
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Vulnerability Title
Tesseract: Heap OOB read in the DAWG loader
Source: CVE Program / CVE List V5
Vulnerability Description
Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata model loaded through TessBaseAPI::Init can cause SquishedDawg::read_squished_dawg in src/dict/dawg.cpp to accept an unterminated forward-edge run, after which SquishedDawg::Load calls num_forward_edges(0) and last_edge in src/dict/dawg.h reads beyond edges_, causing a heap out-of-bounds read and process crash before image processing. This issue is fixed in version 5.5.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
tesseract-ocr tesseract 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
tesseract-ocr tesseract是tesseract-ocr组织的一款光学字符识别引擎。 tesseract-ocr tesseract 5.5.3之前版本存在缓冲区错误漏洞，该漏洞源于特制的.traineddata模型通过TessBaseAPI::Init加载时未能正确处理未终止的前向边运行，导致堆越界读取，可能造成进程崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tesseract-ocr tesseract < 5.5.3 -

II. Public POCs for CVE-2026-73067

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III. Intelligence Information for CVE-2026-73067

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Patches & Fixes for CVE-2026-73067 (4)

Vendor Advisories for CVE-2026-73067 (1)

Other References for CVE-2026-73067 (1)

IV. Related Vulnerabilities

Same product: tesseract
Same vendor: tesseract-ocr
Same weakness: CWE-125