Buffer overflow in Tesseract-Ocr Tesseract
CVE-2026-88051
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, the callback form of GenericVector::read in src/ccutil/genericvector.h reads the independent int32 fields reserved and size_used_ from a .traineddata model without a cap or an invariant check. reserve(reserved) allocates the backing array, but the callback loop writes size_used_ elements. A crafted TESSDATA_INTTEMP component with version_id 4 or later can therefore set reserved to a small value and size_used_ to a large value when fontinfo_table_.read(fp, read_info) is called from src/classify/intproto.cpp, causing a heap out-of-bounds write of FontInfo structures, heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (5.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.9% 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-88qp-4g94-3rf3 (Exploit, Mitigation, Vendor Advisory)
- github.com/tesseract-ocr/tesseract/commit/56e09ca12e751623fe796ce1554ce704bffd2… (Patch)
Frequently asked questions
- What is CVE-2026-88051?
- CVE-2026-88051 is a high-severity vulnerability in Tesseract-Ocr Tesseract, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-09-10.
- How severe is CVE-2026-88051?
- High severity. CVSS v3 base score is 7.8 out of 10.