CVE-2026-73067: CWE-125: Out-of-bounds Read in tesseract-ocr tesseract
CVE-2026-73067 is a medium severity vulnerability in the open source OCR engine Tesseract. Versions prior to 5.5.3 are affected by a heap out-of-bounds read caused by a crafted .traineddata model that triggers an unterminated forward-edge run in the SquishedDawg data structure. This leads to a process crash before image processing begins. The issue is fixed in version 5.5.3.
AI Analysis
Technical Summary
Tesseract OCR versions before 5.5.3 contain a heap out-of-bounds read vulnerability (CWE-125) in the SquishedDawg component. When a specially crafted .traineddata model is loaded via TessBaseAPI::Init, the function SquishedDawg::read_squished_dawg accepts an unterminated forward-edge run. Subsequently, SquishedDawg::Load calls num_forward_edges(0), causing last_edge in src/dict/dawg.h to read beyond the allocated edges_ array. This results in a heap out-of-bounds read and a process crash before any image processing occurs. The vulnerability has a CVSS 4.0 base score of 6.7, indicating medium severity. The issue is resolved in Tesseract version 5.5.3.
Potential Impact
Exploitation of this vulnerability can cause a heap out-of-bounds read leading to a denial of service via process crash when loading a malicious .traineddata model. There is no indication of code execution or data disclosure. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade to Tesseract version 5.5.3 or later, where this vulnerability is fixed. No other mitigation or workaround is documented. Patch status is confirmed fixed in 5.5.3.
CVE-2026-73067: CWE-125: Out-of-bounds Read in tesseract-ocr tesseract
Description
CVE-2026-73067 is a medium severity vulnerability in the open source OCR engine Tesseract. Versions prior to 5.5.3 are affected by a heap out-of-bounds read caused by a crafted .traineddata model that triggers an unterminated forward-edge run in the SquishedDawg data structure. This leads to a process crash before image processing begins. The issue is fixed in version 5.5.3.
CVSS v4.0
Score 6.7medium
Affected software
pkg:github/tesseract-ocr/tesseractRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Tesseract OCR versions before 5.5.3 contain a heap out-of-bounds read vulnerability (CWE-125) in the SquishedDawg component. When a specially crafted .traineddata model is loaded via TessBaseAPI::Init, the function SquishedDawg::read_squished_dawg accepts an unterminated forward-edge run. Subsequently, SquishedDawg::Load calls num_forward_edges(0), causing last_edge in src/dict/dawg.h to read beyond the allocated edges_ array. This results in a heap out-of-bounds read and a process crash before any image processing occurs. The vulnerability has a CVSS 4.0 base score of 6.7, indicating medium severity. The issue is resolved in Tesseract version 5.5.3.
Potential Impact
Exploitation of this vulnerability can cause a heap out-of-bounds read leading to a denial of service via process crash when loading a malicious .traineddata model. There is no indication of code execution or data disclosure. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade to Tesseract version 5.5.3 or later, where this vulnerability is fixed. No other mitigation or workaround is documented. Patch status is confirmed fixed in 5.5.3.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-10T19:37:41.443Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7b3853bf8831d539e79e57
Added to database: 08/11/2026, 14:57:23 UTC
Last enriched: 08/11/2026, 16:03:07 UTC
Last updated: 08/11/2026, 16:03:07 UTC
Views: 3
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