Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-88054

CVE-2026-88054MEDIUM

tesseract-ocr tesseract — Tesseract: Denial of service via empty-stack dereference in Plumbing/Series at model load

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   L   L   N   N   N   N   N   H    6.9   .0015    3.8     —

AFFECTED
  Product    Versions    Fixed
  tesseract  <= 5.5.3 –  —

TIMELINE
  Sep 9   Reserved by GitHub_M
  Sep 10  Published (CNA: GitHub_M)
  Sep 16  EXPLOIT PUBLISHED — CVE-2026-88054 (tesseract-ocr tesseract). Public exploit reference added.

CWE-125, CWE-824 · CNA: GitHub_M · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 9, 2026	Reserved	Reserved by GitHub_M
September 10, 2026	Published	Published (CNA: GitHub_M)
September 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-88054 (tesseract-ocr tesseract). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
tesseract-ocr	tesseract	—	<= 5.5.3	—

Weaknesses

CWE-125 · CWE-824

References (2)

https://github.com/tesseract-ocr/tesseract/commit/552771236b0d80cbdb0c7dd856120fa21a4672e5 [Patch]
https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-f6h7-cqr4-6fx4 [Exploit, Mitigation, Vendor Advisory]

Authoritative record: CVE-2026-88054 at cve.org

Vendors: tesseract-ocr

Weaknesses: CWE-125 · CWE-824

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-88054 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.