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
Trending — Patch released this week
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

A fix is available — apply it.

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

September 9, 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

Vendor Advisories for CVE-2026-73066(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhattesseract-0:4.1.1-3.el8_102026-09-16redhat
redhattesseract-0:5.3.4-7.el10_22026-09-16redhat
redhattesseract-0:4.1.1-8.el9_82026-09-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
tesseract5.3.0-2 ... 5.5.0-1.1 (9 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
tesseract5.5.0-1, 5.5.0-1.1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
tesseract5.5.0-1, 5.5.0-1.1——

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 48× 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. 2026-09-19 04:22 UTCEG score recompute
  2. 2026-09-19 04:22 UTCVendor advisory
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 04:06 UTCEG score recompute
  5. 2026-09-18 04:06 UTCVendor advisory
  6. 2026-09-17 03:50 UTCEG score recompute
  7. 2026-09-17 03:50 UTCVendor advisory
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-16 02:11 UTCEG score recompute
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-11 21:34 UTCEG score recompute
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-10 21:18 UTCEG score recompute
  15. 2026-09-10 09:35 UTCEPSS rescore
  16. 2026-09-09 05:42 UTCEG score recompute
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-07 17:02 UTCEG score recompute
  19. 2026-09-06 13:48 UTCEPSS rescore
  20. 2026-09-06 02:23 UTCEG score recompute
  21. 2026-09-05 02:05 UTCEG score recompute
  22. 2026-09-04 05:07 UTCEPSS rescore
  23. 2026-09-03 01:28 UTCEG score recompute
  24. 2026-09-02 14:12 UTCEPSS rescore
  25. 2026-09-01 13:54 UTCEPSS rescore
Show 45 more
  1. 2026-09-01 13:28 UTCEG score recompute
  2. 2026-09-01 04:40 UTCEPSS rescore
  3. 2026-09-01 04:40 UTCEPSS rescore
  4. 2026-08-31 11:49 UTCEG score recompute
  5. 2026-08-30 19:18 UTCEPSS rescore
  6. 2026-08-30 19:17 UTCEPSS rescore
  7. 2026-08-30 09:57 UTCEG score recompute
  8. 2026-08-30 01:22 UTCEPSS rescore
  9. 2026-08-29 09:41 UTCEG score recompute
  10. 2026-08-28 21:42 UTCEPSS rescore
  11. 2026-08-27 22:25 UTCEG score recompute
  12. 2026-08-27 14:25 UTCEPSS rescore
  13. 2026-08-26 22:09 UTCEG score recompute
  14. 2026-08-26 14:47 UTCEPSS rescore
  15. 2026-08-25 21:53 UTCEG score recompute
  16. 2026-08-25 13:49 UTCEPSS rescore
  17. 2026-08-24 21:37 UTCEG score recompute
  18. 2026-08-23 20:54 UTCEG score recompute
  19. 2026-08-23 00:19 UTCEPSS rescore
  20. 2026-08-22 20:38 UTCEG score recompute
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-21 20:22 UTCEG score recompute
  23. 2026-08-20 22:56 UTCEPSS rescore
  24. 2026-08-19 19:49 UTCEG score recompute
  25. 2026-08-19 17:04 UTCEPSS rescore
  26. 2026-08-18 19:33 UTCEG score recompute
  27. 2026-08-18 13:49 UTCEPSS rescore
  28. 2026-08-18 13:49 UTCEPSS rescore
  29. 2026-08-17 19:17 UTCEG score recompute
  30. 2026-08-17 13:47 UTCEPSS rescore
  31. 2026-08-16 17:56 UTCEG score recompute
  32. 2026-08-16 14:56 UTCEPSS rescore
  33. 2026-08-16 14:56 UTCEPSS rescore
  34. 2026-08-16 02:15 UTCEPSS rescore
  35. 2026-08-15 17:40 UTCEG score recompute
  36. 2026-08-15 01:31 UTCEPSS rescore
  37. 2026-08-14 17:23 UTCEG score recompute
  38. 2026-08-13 22:00 UTCEPSS rescore
  39. 2026-08-12 16:52 UTCEG score recompute
  40. 2026-08-12 13:51 UTCEPSS rescore
  41. 2026-08-11 16:36 UTCEG score recompute
  42. 2026-08-11 15:41 UTCEG score recompute
  43. 2026-08-11 15:35 UTCEG score recompute
  44. 2026-08-11 14:57 UTCEG score recompute
  45. 2026-08-11 14:56 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + 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, with the most recent update on September 9, 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 97.3% 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

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