CVE-2026-88051

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.2% (5th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 10, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Sep 10, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github_commit

commit 56e09ca12e75 (tesseract-ocr/tesseract)

Fix landed in tesseract-ocr/tesseract commit 56e09ca12e75 — awaiting tagged release

https://github.com/tesseract-ocr/tesseract/commit/56e09ca12e751623fe796ce1554ce704bffd2ef0
github Patch Available🟡 PoC Available

Heap out-of-bounds write in GenericVector<T>::read due to independent reserved/size_used_ fields · Advisory · tesseract-ocr/tesseract · GitHub

https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-88qp-4g94-3rf3

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
tesseract5.3.0-2 ... 5.5.0-1.1 (9 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
tesseract5.5.0-1, 5.5.0-1.1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
tesseract5.5.0-1, 5.5.0-1.1
  • every version on: no fix on record
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 06:12 UTCEG score recompute
  2. 2026-10-04 23:22 UTCEPSS rescore
  3. 2026-10-03 21:12 UTCEG score recompute
  4. 2026-10-02 20:49 UTCEG score recompute
  5. 2026-10-01 22:54 UTCEG score recompute
  6. 2026-10-01 19:51 UTCEPSS rescore
  7. 2026-10-01 00:50 UTCEG score recompute
  8. 2026-09-30 15:04 UTCEPSS rescore
  9. 2026-09-30 01:55 UTCEG score recompute
  10. 2026-09-29 02:02 UTCEG score recompute
  11. 2026-09-28 15:11 UTCEG score recompute
  12. 2026-09-28 13:52 UTCEPSS rescore
  13. 2026-09-27 17:25 UTCEG score recompute
  14. 2026-09-27 13:48 UTCEPSS rescore
  15. 2026-09-26 19:28 UTCEG score recompute
  16. 2026-09-26 15:59 UTCEPSS rescore
  17. 2026-09-26 08:36 UTCEG score recompute
  18. 2026-09-24 21:45 UTCEG score recompute
  19. 2026-09-24 14:04 UTCEPSS rescore
  20. 2026-09-23 23:23 UTCEG score recompute
  21. 2026-09-23 17:54 UTCEPSS rescore
  22. 2026-09-23 01:39 UTCEG score recompute
  23. 2026-09-22 16:01 UTCEPSS rescore
  24. 2026-09-22 03:55 UTCEG score recompute
  25. 2026-09-21 21:09 UTCEPSS rescore
Show 24 more
  1. 2026-09-21 05:45 UTCEG score recompute
  2. 2026-09-20 20:16 UTCEPSS rescore
  3. 2026-09-19 20:58 UTCEG score recompute
  4. 2026-09-18 23:15 UTCEG score recompute
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 01:32 UTCEG score recompute
  7. 2026-09-17 19:32 UTCEPSS rescore
  8. 2026-09-16 16:56 UTCEG score recompute▼ 0.80
  9. 2026-09-16 16:40 UTCNVD updateCVSS v3 → 7.8
  10. 2026-09-16 14:09 UTCEPSS rescore
  11. 2026-09-15 15:34 UTCEG score recompute
  12. 2026-09-15 15:02 UTCEG score recompute
  13. 2026-09-15 08:36 UTCEG score recompute
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 00:01 UTCEG score recompute
  16. 2026-09-13 16:48 UTCEPSS rescore
  17. 2026-09-12 15:27 UTCEG score recompute
  18. 2026-09-12 15:02 UTCEPSS rescore
  19. 2026-09-11 17:42 UTCEG score recompute
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-10 18:22 UTCEG score recompute
  23. 2026-09-10 17:40 UTCEG score recompute
  24. 2026-09-10 17:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88051?
CVE-2026-88051 is a high vulnerability published on September 10, 2026. 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 sizeused from a .traineddata model without a cap or an invariant check. reserve(reserved) allocates the…
When was CVE-2026-88051 disclosed?
CVE-2026-88051 was first published on September 10, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88051 actively exploited?
CVE-2026-88051 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-88051?
CVE-2026-88051 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-88051?
A fix for CVE-2026-88051 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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