Out-of-bounds Read in Tesseract-Ocr Tesseract
CVE-2026-88054
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, Plumbing::DeSerialize in src/lstm/plumbing.cpp rejects excessively large network stacks but accepts a zero-length stack for NT_SERIES, NT_PARALLEL, or NT_REVERSED layers in a crafted .traineddata model. During LSTMRecognizer initialization in src/lstm/lstmrecognizer.cpp, CacheXScaleFactor(XScaleFactor()) reaches Series::CacheXScaleFactor in src/lstm/series.cpp, which dereferences stack_[0] on the empty vector and invokes a virtual method through an invalid Network pointer. This causes a deterministic crash and denial of service at model load. No fixed release is available as of this review.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (4.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Tesseract-Ocr Tesseract — versions <= 5.5.3
- Tesseract-Ocr Tesseract Ocr
Weakness classification (CWE)
References
- github.com/tesseract-ocr/tesseract/security/advisories/GHSA-f6h7-cqr4-6fx4 (Exploit, Mitigation, Vendor Advisory)
- github.com/tesseract-ocr/tesseract/commit/552771236b0d80cbdb0c7dd856120fa21a467… (Patch)
Frequently asked questions
- What is CVE-2026-88054?
- CVE-2026-88054 is a medium-severity vulnerability in Tesseract-Ocr Tesseract, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-09-10.
- How severe is CVE-2026-88054?
- Medium severity. CVSS v3 base score is 5.5 out of 10.