CVE-2026-100690

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-26. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-87663 (ENISA EUVD) · GHSA-gqg5-5gw3-54pq (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Hugo versions from v0.161.0 through v0.165.0 run Node.js tools (css.PostCSS, css.TailwindCSS, js.Babel) under the Node.js permission model to restrict file system reads to the project directory and configured mounts. Because the Node.js permission model validates only the lexical path and follows symbolic links that point outside the allowed set, Hugo did not detect symlinks escaping the sandbox. An attacker who can contribute content to a Hugo project (for example via a pull request) can commit a symlink such as assets/css/x.css -> /etc/passwd together with a PostCSS plugin that reads it, allowing any file readable by the Hugo build process to be disclosed and potentially embedded in the published site. This affects builds using the default security configuration; projects that do not invoke Node.js tools are unaffected. Fixed in v0.166.0, which scans allowed paths and fails the build when a symbolic link resolves outside them.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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
29th
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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 none (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

September 26, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Sep 26, 2026
Patch available. Sources: github.
Web page

Hugo v0.161.0 to v0.165.0 Arbitrary File Read via Symlinks | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hugo-0.161.0-to-0.165.0-arbitrary-file-read-via-symlinks
GitHub advisoryMentions a patch (unverified)

Arbitrary file read via symlinks bypassing the Node.js permission model in css.PostCSS and other Node.js tools · Advisory · gohugoio/hugo · GitHub

Affected: v0.166.0. Before a Node.js tool is invoked, Hugo now scans the allowed paths and

https://github.com/gohugoio/hugo/security/advisories/GHSA-x3mx-cm49-8m9c

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatcluster-observability-operator/korrel8r-rhel9:17908544902026-10-01redhat
redhathugo-main-0.166.0-0.1.hum12026-09-09redhat

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
hugo0.131.0-1 ... 0.167.0-2 (50 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 90× 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 98 of 132 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 34 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 00:56 UTCEG score recompute
  2. 2026-11-02 00:56 UTCVendor advisory
  3. 2026-11-02 00:56 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  4. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  7. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  8. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-26 15:32 UTCEG score recompute
  12. 2026-10-26 15:32 UTCVendor advisory
  13. 2026-10-26 15:32 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-10-25 15:58 UTCEG score recompute
  16. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  17. 2026-10-24 05:35 UTCEG score recompute
  18. 2026-10-24 05:35 UTCVendor advisory
  19. 2026-10-24 05:35 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  21. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  22. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  23. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  24. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  25. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
Show 73 more
  1. 2026-10-18 05:11 UTCEG score recompute
  2. 2026-10-17 20:11 UTCEG score recompute
  3. 2026-10-17 20:11 UTCVendor advisory
  4. 2026-10-17 20:11 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  6. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  7. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  10. 2026-10-12 16:41 UTCEG score recompute
  11. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  12. 2026-10-12 03:47 UTCVendor advisory
  13. 2026-10-12 03:47 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-10-11 20:16 UTCEG score recompute
  15. 2026-10-11 18:29 UTCEG score recompute
  16. 2026-10-11 15:05 UTCVendor advisory
  17. 2026-10-11 15:05 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  18. 2026-10-11 15:02 UTCEG score recompute
  19. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  20. 2026-10-11 02:37 UTCEG score recompute
  21. 2026-10-11 02:37 UTCVendor advisory
  22. 2026-10-11 02:37 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  24. 2026-10-10 13:57 UTCVendor advisory
  25. 2026-10-10 13:57 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  26. 2026-10-10 01:28 UTCEG score recompute
  27. 2026-10-10 01:28 UTCVendor advisory
  28. 2026-10-10 01:28 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  29. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  30. 2026-10-09 12:58 UTCVendor advisory
  31. 2026-10-09 12:57 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  32. 2026-10-09 00:27 UTCEG score recompute
  33. 2026-10-09 00:27 UTCVendor advisory
  34. 2026-10-09 00:27 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  36. 2026-10-08 11:59 UTCEG score recompute
  37. 2026-10-08 11:59 UTCVendor advisory
  38. 2026-10-08 11:59 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  39. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  40. 2026-10-07 23:30 UTCVendor advisory
  41. 2026-10-07 23:30 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  42. 2026-10-07 11:02 UTCVendor advisory
  43. 2026-10-07 11:02 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  44. 2026-10-06 22:33 UTCEG score recompute
  45. 2026-10-06 22:33 UTCVendor advisory
  46. 2026-10-06 22:33 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  47. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  48. 2026-10-06 10:04 UTCVendor advisory
  49. 2026-10-06 10:04 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-10-05 21:19 UTCEG score recompute
  51. 2026-10-05 21:19 UTCVendor advisory
  52. 2026-10-05 21:18 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  54. 2026-10-05 08:50 UTCEG score recompute
  55. 2026-10-05 08:50 UTCVendor advisory
  56. 2026-10-05 08:50 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  57. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  58. 2026-10-04 20:20 UTCVendor advisory
  59. 2026-10-04 20:20 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  60. 2026-10-04 07:48 UTCVendor advisory
  61. 2026-10-04 07:48 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  62. 2026-10-03 19:20 UTCEG score recompute
  63. 2026-10-03 19:20 UTCVendor advisory
  64. 2026-10-03 19:20 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  65. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  66. 2026-10-03 06:51 UTCVendor advisory
  67. 2026-10-03 06:51 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  68. 2026-10-02 18:22 UTCEG score recompute
  69. 2026-10-02 18:22 UTCVendor advisory
  70. 2026-10-02 18:22 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-10-02 05:54 UTCEG score recompute
  72. 2026-10-02 05:54 UTCVendor advisory
  73. 2026-10-02 05:54 UTCGHSA enrichmentGHSA-gqg5-5gw3-54pq · GitHub severity HIGH · GitHub CVSS 7.5

Frequently asked(5)

What is CVE-2026-100690?
CVE-2026-100690 is a high-severity vulnerability; its CVE record was published on September 26, 2026. Hugo versions from v0.161.0 through v0.165.0 run Node.js tools (css.PostCSS, css.TailwindCSS, js.Babel) under the Node.js permission model to restrict file system reads to the project directory and configured mounts. Because the Node.js permission model validates only the lexical path and follows…
When was CVE-2026-100690 made public?
CVE-2026-100690 was made public on September 9, 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 September 26, 2026. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-100690 actively exploited?
CVE-2026-100690 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100690?
CVE-2026-100690 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100690?
A fix for CVE-2026-100690 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100690 are linked in the Vendor Advisories panel on this page.

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