CVE-2026-73066

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 97% of all CVEs by exploit prediction. 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, secondary
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause an unchecked signed integer multiplication in Convolve::DeSerialize in src/lstm/convolve.cpp to wrap the convolution output-channel count, undersizing the forward-pass output buffer while writes use the unwrapped element count and causing a heap out-of-bounds write during OCR recognition. This issue is fixed in version 5.5.3.

CVSS v3
6.8
EG Score
6.8(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: Track

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
Severity68% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 11, 2026

Advisory Details (4)

Auto-updated Aug 11, 2026
Patch available. Sources: github_pr, github_commit, github_release, github.
github_release Patch Available

5.5.3

Patch available: tesseract-ocr/tesseract 5.5.3

https://github.com/tesseract-ocr/tesseract/releases/tag/5.5.3
github_commit Patch Available

commit 2f4d2f4bf45c (tesseract-ocr/tesseract)

Patch available: tesseract-ocr/tesseract 5.5.3 (contains commit 2f4d2f4bf45c)

https://github.com/tesseract-ocr/tesseract/commit/2f4d2f4bf45c363785d7bf1da29b6628f8939a72
github_pr Patch Available

Fix integer overflow in LSTM Convolve and Reconfig deserialization

Patch available: tesseract-ocr/tesseract 5.5.3 (PR #4588 merged 2026-07-23)

https://github.com/tesseract-ocr/tesseract/pull/4588
github Patch Available

Heap out-of-bounds write (CWE-787) in LSTM Convolve layer via crafted .traineddata · Advisory · tesseract-ocr/tesseract · GitHub

https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7j76-5rq5-5jg8

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 38× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 09:41 UTCEG score recompute
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 22:25 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 22:09 UTCEG score recompute
  7. 2026-08-26 14:47 UTCEPSS rescore
  8. 2026-08-25 21:53 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 21:37 UTCEG score recompute
  11. 2026-08-23 20:54 UTCEG score recompute
  12. 2026-08-23 00:19 UTCEPSS rescore
  13. 2026-08-22 20:38 UTCEG score recompute
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 20:22 UTCEG score recompute
  16. 2026-08-20 22:56 UTCEPSS rescore
  17. 2026-08-19 19:49 UTCEG score recompute
  18. 2026-08-19 17:04 UTCEPSS rescore
  19. 2026-08-18 19:33 UTCEG score recompute
  20. 2026-08-18 13:49 UTCEPSS rescore
  21. 2026-08-18 13:49 UTCEPSS rescore
  22. 2026-08-17 19:17 UTCEG score recompute
  23. 2026-08-17 13:47 UTCEPSS rescore
  24. 2026-08-16 17:56 UTCEG score recompute
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 13 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 02:15 UTCEPSS rescore
  3. 2026-08-15 17:40 UTCEG score recompute
  4. 2026-08-15 01:31 UTCEPSS rescore
  5. 2026-08-14 17:23 UTCEG score recompute
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-12 16:52 UTCEG score recompute
  8. 2026-08-12 13:51 UTCEPSS rescore
  9. 2026-08-11 16:36 UTCEG score recompute
  10. 2026-08-11 15:41 UTCEG score recompute
  11. 2026-08-11 15:35 UTCEG score recompute
  12. 2026-08-11 14:57 UTCEG score recompute
  13. 2026-08-11 14:56 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73066?
CVE-2026-73066 is a medium vulnerability published on August 11, 2026. Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause an unchecked signed integer multiplication in Convolve::DeSerialize in src/lstm/convolve.cpp to wrap the convolution output-channel count,…
When was CVE-2026-73066 disclosed?
CVE-2026-73066 was first published in the National Vulnerability Database on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73066 actively exploited?
CVE-2026-73066 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.4% of all scored CVEs.
What is the CVSS score of CVE-2026-73066?
CVE-2026-73066 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-73066?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73066, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-73066

Explore →

Is Your Infrastructure Affected by CVE-2026-73066?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs