CVE-2026-89259

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-11. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Hugo is a static site generator. From v0.161.0, Hugo executes Node tools under Node's permission model, but TailwindCSS — included in the default security.exec.allow list — requires a highly permissive configuration (--allow-addons, --allow-child-process, --allow-worker). As a result, the restrictions intended by the fix for GHSA-x597-9fr4-5857 could still be bypassed, allowing a Node tool invoked during a build to read and write files outside the project's working directory. Affected versions are those after v0.43; the issue was fixed in v0.165.0 by removing tailwindcss from the default security.exec.allow list. Users who do not use TailwindCSS, or who only build trusted sites, are not affected. As a workaround, users can define a restrictive security.exec.allow list in hugo.toml.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 11, 2026

Advisory Details (2)

Auto-updated Sep 18, 2026
Patch available. Sources: github.
generic

Hugo before v0.165.0 Insufficient Permission Restriction via TailwindCSS | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hugo-before-0.165.0-insufficient-permission-restriction-via-tailwindcss
github Patch Available

TailwindCSS needs elevated Node permissions · Advisory · gohugoio/hugo · GitHub

https://github.com/gohugoio/hugo/security/advisories/GHSA-vrm6-x8vp-mv2r

Vendor Advisories for CVE-2026-89259(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 55× in last 7d / 72× 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 20:14 UTCGHSA enrichment
  2. 2026-09-19 16:14 UTCEG score recompute
  3. 2026-09-19 16:14 UTCGHSA enrichment
  4. 2026-09-19 12:14 UTCGHSA enrichment
  5. 2026-09-19 08:14 UTCGHSA enrichment
  6. 2026-09-19 04:14 UTCGHSA enrichment
  7. 2026-09-19 00:13 UTCGHSA enrichment
  8. 2026-09-18 20:13 UTCEG score recompute
  9. 2026-09-18 20:13 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 16:13 UTCGHSA enrichment
  12. 2026-09-18 11:54 UTCGHSA enrichment
  13. 2026-09-18 07:54 UTCGHSA enrichment
  14. 2026-09-18 03:53 UTCGHSA enrichment
  15. 2026-09-17 23:53 UTCGHSA enrichment
  16. 2026-09-17 19:43 UTCEG score recompute
  17. 2026-09-17 19:43 UTCGHSA enrichment
  18. 2026-09-17 19:32 UTCEPSS rescore
  19. 2026-09-17 14:47 UTCGHSA enrichment
  20. 2026-09-17 10:46 UTCGHSA enrichment
  21. 2026-09-17 06:43 UTCGHSA enrichment
  22. 2026-09-17 02:29 UTCGHSA enrichment
  23. 2026-09-16 22:28 UTCGHSA enrichment
  24. 2026-09-16 18:27 UTCGHSA enrichment
  25. 2026-09-16 14:25 UTCEG score recompute
Show 47 more
  1. 2026-09-16 14:25 UTCGHSA enrichment
  2. 2026-09-16 14:09 UTCEPSS rescore
  3. 2026-09-16 10:23 UTCGHSA enrichment
  4. 2026-09-16 06:23 UTCEG score recompute
  5. 2026-09-16 06:22 UTCGHSA enrichment
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-16 02:22 UTCGHSA enrichment
  8. 2026-09-15 22:21 UTCGHSA enrichment
  9. 2026-09-15 18:21 UTCGHSA enrichment
  10. 2026-09-15 14:21 UTCGHSA enrichment
  11. 2026-09-15 10:21 UTCGHSA enrichment
  12. 2026-09-15 06:20 UTCEG score recompute
  13. 2026-09-15 06:20 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 02:19 UTCGHSA enrichment
  16. 2026-09-14 22:15 UTCGHSA enrichment
  17. 2026-09-14 18:15 UTCGHSA enrichment
  18. 2026-09-14 13:25 UTCGHSA enrichment
  19. 2026-09-14 09:25 UTCGHSA enrichment
  20. 2026-09-14 05:25 UTCGHSA enrichment
  21. 2026-09-14 01:25 UTCGHSA enrichment
  22. 2026-09-13 21:25 UTCGHSA enrichment
  23. 2026-09-13 17:25 UTCEG score recompute
  24. 2026-09-13 17:25 UTCGHSA enrichment
  25. 2026-09-13 16:48 UTCEPSS rescore
  26. 2026-09-13 13:25 UTCGHSA enrichment
  27. 2026-09-13 09:25 UTCGHSA enrichment
  28. 2026-09-13 05:25 UTCGHSA enrichment
  29. 2026-09-13 01:25 UTCGHSA enrichment
  30. 2026-09-12 21:25 UTCGHSA enrichment
  31. 2026-09-12 17:24 UTCEG score recompute
  32. 2026-09-12 17:24 UTCGHSA enrichment
  33. 2026-09-12 15:02 UTCEPSS rescore
  34. 2026-09-12 13:24 UTCGHSA enrichment
  35. 2026-09-12 09:23 UTCGHSA enrichment
  36. 2026-09-12 05:22 UTCGHSA enrichment
  37. 2026-09-12 01:22 UTCGHSA enrichment
  38. 2026-09-11 21:22 UTCEG score recompute
  39. 2026-09-11 21:22 UTCGHSA enrichment
  40. 2026-09-11 20:34 UTCEG score recompute
  41. 2026-09-11 20:34 UTCGHSA enrichment
  42. 2026-09-11 20:23 UTCGHSA enrichment
  43. 2026-09-11 16:23 UTCEG score recompute
  44. 2026-09-11 16:23 UTCGHSA enrichment
  45. 2026-09-11 12:22 UTCEG score recompute
  46. 2026-09-11 11:27 UTCEG score recompute
  47. 2026-09-11 11:24 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89259?
CVE-2026-89259 is a critical vulnerability published on September 11, 2026. Hugo is a static site generator. From v0.161.0, Hugo executes Node tools under Node's permission model, but TailwindCSS — included in the default security.exec.allow list — requires a highly permissive configuration (--allow-addons, --allow-child-process, --allow-worker). As a result, the…
When was CVE-2026-89259 disclosed?
CVE-2026-89259 was first published in the National Vulnerability Database on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89259 actively exploited?
CVE-2026-89259 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 64.9% of all scored CVEs.
What is the CVSS score of CVE-2026-89259?
CVE-2026-89259 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-89259?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89259, 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-2026-89259

Explore →

Is Your Infrastructure Affected by CVE-2026-89259?

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

Start Free Scan →Browse All CVEs