CVE-2026-73067 Tesseract: Heap OOB read in the DAWG loader
A crafted traineddata model causes a heap out-of-bounds read and crash in Tesseract OCR, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-73067?
CVE-2026-73067 is a medium-severity memory corruption vulnerability in tesseract-ocr tesseract, published on 11 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-73067?
How do I fix CVE-2026-73067?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-73067 being exploited?
There is no known exploitation of CVE-2026-73067 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-73067, ECHO-5983-323c-2827, GHSA-x3vq-7rr7-5x3h, UBUNTU-CVE-2026-73067.