CVE-2026-79674

HIGHPre-NVD 8.28.2
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (32nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 4 sources updated this weekElevated

Also known asEUVD-2026-65524 (ENISA EUVD) · GHSA-3gq4-3j92-5w49 (GitHub Security Advisories) · GHSA-rcw8-9qrw-27m2 (GitHub Security Advisories)Source: ENISA EUVD

8.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.2Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

NLTK versions before 3.10.3 contain a path sandbox bypass vulnerability in corpus-reader constructors that allows attackers to read files outside the intended data root. Attackers can supply arbitrary corpus root paths to LinThesaurusCorpusReader and PanLexLiteCorpusReader constructors to access filesystem content and SQLite databases outside the pathsec sandbox boundary.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
68
EG Risk 68/100

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)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
32nd
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 (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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; Attend at high (mission-essential systems).

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 yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

August 25, 2026

Last Modified

August 31, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Corpus Reader Sandbox Bypass · Advisory · nltk/nltk · GitHub

https://github.com/nltk/nltk/security/advisories/GHSA-3gq4-3j92-5w49

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhoai/odh-trustyai-nemo-guardrails-server-rhel9:17915666312026-10-21redhat
redhatrhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9:17918671892026-10-21redhat
redhatrhoai/odh-trustyai-nemo-guardrails-server-rhel9:17915561282026-10-19redhat
redhatrhoai/odh-llama-stack-core-rhel9:17891212862026-09-30redhat
redhatrhoai/odh-ta-lmes-job-rhel9:17889358632026-09-21redhat
pipnltk @ 3.10.3 (fixes <= 3.10.2)—ghsa

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

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
nltk3.10.0-1 ... 3.9.3-1 (9 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
nltk3.10.0-1 ... 3.9.3-1 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
nltk3.10.0-1, 3.10.1-1, 3.9.1-2, 3.9.2-1, 3.9.3-1
  • every version up to 3.10.3-1: fixed in 3.10.3-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
nltk0.8 ... 3.9b1 (68 versions)
  • every version up to 3.10.3: fixed in 3.10.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 61× 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.

Showing the most recent 100 of 168 refreshes on record for this CVE.

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. None are among the latest 100 rows. The 68 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-11-01 07:38 UTCGHSA enrichmentGHSA-3gq4-3j92-5w49 · GitHub severity HIGH
  3. 2026-11-01 07:38 UTCEG score recompute
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  6. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-10-28 06:37 UTCEG score recompute
  9. 2026-10-28 06:37 UTCVendor advisory
  10. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-10-25 13:59 UTCEG score recompute
  14. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-20 18:16 UTCEG score recompute
  19. 2026-10-20 18:16 UTCVendor advisory
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  21. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  22. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  23. 2026-10-18 03:10 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  25. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 31st percentile
Show 75 more
  1. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  4. 2026-10-13 06:37 UTCEG score recompute
  5. 2026-10-13 06:37 UTCVendor advisory
  6. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  7. 2026-10-12 14:58 UTCEG score recompute
  8. 2026-10-11 19:22 UTCEG score recompute
  9. 2026-10-11 16:38 UTCEG score recompute
  10. 2026-10-11 13:56 UTCEG score recompute
  11. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-10-10 12:02 UTCEG score recompute
  14. 2026-10-10 12:02 UTCVendor advisory
  15. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  16. 2026-10-09 04:23 UTCEG score recompute
  17. 2026-10-09 04:23 UTCVendor advisory
  18. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  19. 2026-10-08 03:17 UTCEG score recompute
  20. 2026-10-08 03:17 UTCVendor advisory
  21. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  22. 2026-10-07 05:03 UTCVendor advisory
  23. 2026-10-06 16:09 UTCEG score recompute
  24. 2026-10-06 16:09 UTCVendor advisory
  25. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  26. 2026-10-06 02:33 UTCEG score recompute
  27. 2026-10-06 02:33 UTCVendor advisory
  28. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  29. 2026-10-05 08:44 UTCEG score recompute
  30. 2026-10-05 08:44 UTCVendor advisory
  31. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  32. 2026-10-04 19:50 UTCVendor advisory
  33. 2026-10-04 05:19 UTCVendor advisory
  34. 2026-10-03 16:26 UTCEG score recompute
  35. 2026-10-03 16:26 UTCVendor advisory
  36. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  37. 2026-10-03 01:47 UTCEG score recompute
  38. 2026-10-03 01:47 UTCVendor advisory
  39. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  40. 2026-10-02 12:53 UTCVendor advisory
  41. 2026-10-01 22:42 UTCEG score recompute
  42. 2026-10-01 22:42 UTCVendor advisory
  43. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  44. 2026-10-01 09:08 UTCVendor advisory
  45. 2026-09-30 20:15 UTCEG score recompute
  46. 2026-09-30 20:15 UTCVendor advisory
  47. 2026-09-30 06:47 UTCEG score recompute
  48. 2026-09-30 06:47 UTCVendor advisory
  49. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  50. 2026-09-29 14:35 UTCVendor advisory
  51. 2026-09-29 01:40 UTCEG score recompute
  52. 2026-09-29 01:40 UTCVendor advisory
  53. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  54. 2026-09-28 12:47 UTCVendor advisory
  55. 2026-09-27 23:53 UTCEG score recompute
  56. 2026-09-27 23:53 UTCVendor advisory
  57. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  58. 2026-09-27 10:59 UTCVendor advisory
  59. 2026-09-26 22:05 UTCEG score recompute
  60. 2026-09-26 22:05 UTCVendor advisory
  61. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  62. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  63. 2026-09-25 05:08 UTCEG score recompute
  64. 2026-09-25 05:08 UTCVendor advisory
  65. 2026-09-24 16:13 UTCEG score recompute
  66. 2026-09-24 16:13 UTCVendor advisory
  67. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  68. 2026-09-24 03:20 UTCEG score recompute
  69. 2026-09-24 03:20 UTCVendor advisory
  70. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  71. 2026-09-23 14:26 UTCVendor advisory
  72. 2026-09-23 01:31 UTCEG score recompute
  73. 2026-09-23 01:31 UTCVendor advisory
  74. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  75. 2026-09-22 12:38 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-79674?
CVE-2026-79674 is a high-severity vulnerability; its CVE record was published on August 25, 2026. NLTK versions before 3.10.3 contain a path sandbox bypass vulnerability in corpus-reader constructors that allows attackers to read files outside the intended data root. Attackers can supply arbitrary corpus root paths to LinThesaurusCorpusReader and PanLexLiteCorpusReader constructors to access…
When was CVE-2026-79674 made public?
CVE-2026-79674 was made public on August 11, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 25, 2026. EchelonGraph's copy of the record carries a last-modified date of August 31, 2026; the record at its source may have been updated since.
Is CVE-2026-79674 actively exploited?
CVE-2026-79674 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-79674?
CVE-2026-79674 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-79674?
A fix for CVE-2026-79674 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-79674 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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