CVE-2026-78680

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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.

NLTK versions before 3.10.3 fail to use validated absolute paths when invoking the Graphviz dot binary in dependencygraph.dot2img and AlignedSent._repr_svg_, allowing attackers to execute arbitrary code by placing a malicious dot binary in the search path or current working directory. Attackers can exploit bare-name binary resolution on Windows via the current working directory or on Unix-like systems via relative PATH entries to execute their binary instead of the legitimate Graphviz tool.

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
6th
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

August 25, 2026

Last Modified

September 23, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
Patch available. Sources: github.
generic

NLTK before 3.10.3 Arbitrary Code Execution via Graphviz dot Binary | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nltk-before-arbitrary-code-execution-via-graphviz-dot-binary
githubMentions a patch (unverified)

Uncontrolled search path when invoking the Graphviz 'dot' binary (CWE-426/CWE-427) · Advisory · nltk/nltk · GitHub

https://github.com/nltk/nltk/security/advisories/GHSA-6hwm-xvph-95vm

Vendor Advisories for CVE-2026-78680(1)

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

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 12× in last 7d / 53× 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.

Showing the most recent 100 of 101 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-78680?
CVE-2026-78680 is a high vulnerability published on August 25, 2026. NLTK versions before 3.10.3 fail to use validated absolute paths when invoking the Graphviz dot binary in dependencygraph.dot2img and AlignedSent.reprsvg_, allowing attackers to execute arbitrary code by placing a malicious dot binary in the search path or current working directory. Attackers can…
When was CVE-2026-78680 disclosed?
CVE-2026-78680 was first published on August 25, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78680 actively exploited?
CVE-2026-78680 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78680?
CVE-2026-78680 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-78680?
A fix for CVE-2026-78680 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-78680 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-78680

Explore →

Is Your Infrastructure Affected by CVE-2026-78680?

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

Book a Demo →Browse All CVEs