Out-of-bounds write in tesseract - #VU140986
Published: August 5, 2026
Vulnerability identifier: #VU140986
CSH Severity: Medium
CVSS v4: 6.7 [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]
CVE-ID: N/A
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds write in the LSTM Convolve layer when parsing a crafted .traineddata LSTM model component during ordinary OCR recognition. A remote attacker can supply a specially crafted .traineddata file to cause a denial of service.
The issue is triggered after the malicious model file is loaded through Tesseract's .traineddata deserializer.
Affected software
tesseract
Remediation
Install security update from vendor's website.
tesseract - update to 5.5.3