CVE-2026-88047

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.1% (1st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2026-75590 (ENISA EUVD)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, Classify::ReadNormProtos in src/classify/normmatch.cpp parses the NORMPROTO component of a .traineddata file and uses std::istream::operator>>(char*) to extract a whitespace-delimited token into a fixed 61-byte stack buffer without setting a stream width. The 100-byte line buffer can carry a token of up to 99 characters, so a token longer than 60 characters writes up to 39 attacker-controlled bytes past the buffer during TessBaseAPI::Init of the legacy engine, causing stack corruption, denial of service, and potentially control-flow hijacking on affected standard-library implementations. Builds using Apple's libc++ C++20 bounded array overload are incidentally protected, while typical libstdc++ builds remain affected. No fixed release is available as of this review.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 10, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Sep 10, 2026
Patch available. Sources: github, github_commit.
GitHub commit

commit 1bda5079b1c8 (tesseract-ocr/tesseract)

Fix landed in tesseract-ocr/tesseract commit 1bda5079b1c8 — awaiting tagged release

https://github.com/tesseract-ocr/tesseract/commit/1bda5079b1c8a7e25f523486837426903d29ce84
GitHub advisoryMentions a patch (unverified)

ReadNormProtos stack buffer overflow · Advisory · tesseract-ocr/tesseract · GitHub

https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-5j2p-r5vc-q7f3

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntutesseract-ocr-all (4.1.1-2ubuntu0.1~esm1) @ focal2026-10-28ubuntu

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 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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 51× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 96 is merged into the row it repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-10-28 12:09 UTCEG score recompute
  5. 2026-10-28 12:09 UTCVendor advisory
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-10-25 13:53 UTCEG score recompute
  10. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-20 17:52 UTCEG score recompute
  14. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-18 03:03 UTCEG score recompute
  18. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-10-13 05:04 UTCEG score recompute
  23. 2026-10-13 05:04 UTCVendor advisory
  24. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-10-12 14:49 UTCEG score recompute
Show 70 more
  1. 2026-10-11 21:55 UTCVendor advisory
  2. 2026-10-11 19:15 UTCEG score recompute
  3. 2026-10-11 16:32 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-10-11 13:49 UTCEG score recompute
  6. 2026-10-11 10:13 UTCVendor advisory
  7. 2026-10-10 20:10 UTCEG score recompute
  8. 2026-10-10 20:10 UTCVendor advisory
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-10 08:09 UTCEG score recompute
  11. 2026-10-10 08:09 UTCVendor advisory
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-08 23:47 UTCEG score recompute
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-08 10:13 UTCEG score recompute
  16. 2026-10-08 10:13 UTCVendor advisory
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-07 10:12 UTCVendor advisory
  19. 2026-10-06 22:31 UTCEG score recompute
  20. 2026-10-06 22:31 UTCVendor advisory
  21. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-10-05 22:57 UTCEG score recompute
  23. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-10-04 23:37 UTCEG score recompute
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  26. 2026-10-04 00:16 UTCEG score recompute
  27. 2026-10-03 00:31 UTCEG score recompute
  28. 2026-10-02 01:10 UTCEG score recompute
  29. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  30. 2026-10-01 01:39 UTCEG score recompute
  31. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  32. 2026-09-30 01:55 UTCEG score recompute
  33. 2026-09-29 01:24 UTCEG score recompute
  34. 2026-09-27 14:21 UTCEG score recompute
  35. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  36. 2026-09-27 02:41 UTCEG score recompute
  37. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  38. 2026-09-26 03:04 UTCEG score recompute
  39. 2026-09-24 15:53 UTCEG score recompute
  40. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  41. 2026-09-24 04:13 UTCEG score recompute
  42. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  43. 2026-09-22 17:12 UTCEG score recompute
  44. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  45. 2026-09-22 05:01 UTCEG score recompute
  46. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  47. 2026-09-19 18:31 UTCEG score recompute
  48. 2026-09-19 06:50 UTCEG score recompute
  49. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  50. 2026-09-17 19:47 UTCEG score recompute
  51. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  52. 2026-09-16 19:04 UTCEG score recompute
  53. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  54. 2026-09-16 07:22 UTCEG score recompute
  55. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  56. 2026-09-15 07:55 UTCEG score recompute
  57. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  58. 2026-09-14 20:14 UTCEG score recompute▼ 0.80
  59. 2026-09-14 20:13 UTCNVD updateCVSS v3 → 7.8
  60. 2026-09-13 20:06 UTCEG score recompute
  61. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-09-12 20:45 UTCEG score recompute
  63. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-09-11 21:23 UTCEG score recompute
  65. 2026-09-11 20:47 UTCEG score recompute
  66. 2026-09-11 19:21 UTCEG score recompute
  67. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  68. 2026-09-10 17:20 UTCEG score recompute
  69. 2026-09-10 16:25 UTCEG score recomputeFirst assessed: 8.6 HIGH
  70. 2026-09-10 16:24 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-88047?
CVE-2026-88047 is a high-severity vulnerability; its CVE record was published on September 10, 2026. Tesseract is an open source OCR engine. In version 5.5.3 and earlier, Classify::ReadNormProtos in src/classify/normmatch.cpp parses the NORMPROTO component of a .traineddata file and uses std::istream::operator>>(char*) to extract a whitespace-delimited token into a fixed 61-byte stack buffer…
When was the CVE record for CVE-2026-88047 published?
The CVE record for CVE-2026-88047 was published on September 10, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 14, 2026; the record at its source may have been updated since.
Is CVE-2026-88047 actively exploited?
CVE-2026-88047 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-88047?
CVE-2026-88047 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-88047?
A fix for CVE-2026-88047 is available: update to the fixed version the vendor names in its advisory.

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