CVE-2026-84365

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory (severity: MODERATE) published 2026-09-08. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-69612 (ENISA EUVD) · GHSA-gqvv-2mrq-wpjv (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Hono is a Web application framework that provides support for any JavaScript runtime. From 4.12.12 until 4.13.5, the fix released for CVE-2026-39408 does not cover every traversal sequence, and toSSG() can still write files outside the configured output directory when a route parameter contains consecutive parent-directory segments. Static site generation builds each output path from the route path and values supplied through ssgParams, then verifies that the result stays inside the output directory using the same normalization routine that built the path. That routine does not fully collapse runs of consecutive parent-directory segments, allowing a path that the check accepts to resolve outside the output directory, and the check also treats output directories that differ in how they are rooted as equivalent. This arises when an application generates a static site from route parameter values it does not fully control, such as slugs from a CMS, API, or user submission. An untrusted ssgParams value can create or overwrite files elsewhere in the build environment and alter generated artifacts or deployment output. The vulnerability affects build-time static site generation only; request-time routing and applications with entirely developer-controlled ssgParams values are not affected. This issue is fixed in version 4.13.5.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 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.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.4%
EPSS %ILE
38th
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-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 2026-10-31). 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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 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 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 1, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Sep 1, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub release Patch Available

v4.13.5

Patch available: honojs/hono v4.13.5

https://github.com/honojs/hono/releases/tag/v4.13.5
GitHub commit Patch Available

commit 3a67f7f3997e (honojs/hono)

Patch available: honojs/hono v4.13.5 (contains commit 3a67f7f3997e)

https://github.com/honojs/hono/commit/3a67f7f3997e1437d108f7bcba2dbcee2df69221
GitHub advisoryMentions a patch (unverified)

Incomplete fix for CVE-2026-39408: `toSSG()` still writes files outside the output directory · Advisory · honojs/hono · GitHub

https://github.com/honojs/hono/security/advisories/GHSA-gqvv-2mrq-wpjv

Vendor Advisories for CVE-2026-84365(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
npmhono @ 4.13.5 (fixes < 4.13.5)—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

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
hono—
  • every version up to 4.13.5: fixed in 4.13.5
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 111 rows on record for this CVE, as 98 entries (2 repeats merged).

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 11 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  2. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  3. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  4. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  5. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  6. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  7. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  8. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  9. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  10. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  11. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  12. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  13. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  14. 2026-11-01 07:38 UTCGHSA enrichmentGHSA-gqvv-2mrq-wpjv · GitHub severity MODERATE · GitHub CVSS 6.5
  15. 2026-11-01 07:38 UTCEchelonGraph re-scored
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  17. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  18. 2026-10-30 00:55 UTCOSV refresh
  19. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  20. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  21. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  22. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  23. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  24. 2026-10-25 13:56 UTCEchelonGraph re-scored
  25. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
Show 73 more
  1. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-22 13:14 UTCEchelonGraph re-scored
  4. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  6. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-18 03:06 UTCEchelonGraph re-scored
  9. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-10-12 14:53 UTCEchelonGraph re-scored
  16. 2026-10-11 19:18 UTCEchelonGraph re-scored
  17. 2026-10-11 16:35 UTCEchelonGraph re-scored
  18. 2026-10-11 13:52 UTCEchelonGraph re-scored
  19. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  20. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-10-10 05:04 UTCEchelonGraph re-scored
  22. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-10-09 01:52 UTCEchelonGraph re-scored
  24. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  25. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  26. 2026-10-07 09:48 UTCEchelonGraph re-scored
  27. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  28. 2026-10-06 07:20 UTCEchelonGraph re-scored
  29. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  30. 2026-10-05 05:00 UTCEchelonGraph re-scored
  31. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  32. 2026-10-04 02:50 UTCEchelonGraph re-scored
  33. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  34. 2026-10-03 00:39 UTCEchelonGraph re-scored
  35. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  36. 2026-10-01 22:29 UTCEchelonGraph re-scored
  37. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  38. 2026-09-30 19:30 UTCEchelonGraph re-scored
  39. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  40. 2026-09-29 14:01 UTCEchelonGraph re-scored
  41. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  42. 2026-09-28 11:06 UTCEchelonGraph re-scored
  43. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  44. 2026-09-27 08:56 UTCEchelonGraph re-scored
  45. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  46. 2026-09-26 06:46 UTCEchelonGraph re-scored
  47. 2026-09-25 04:11 UTCEchelonGraph re-scored
  48. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  49. 2026-09-22 23:52 UTCEchelonGraph re-scored
  50. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  51. 2026-09-21 21:42 UTCEchelonGraph re-scored
  52. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  53. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  54. 2026-09-19 17:22 UTCEchelonGraph re-scored
  55. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  56. 2026-09-18 15:12 UTCEchelonGraph re-scored
  57. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  58. 2026-09-17 13:02 UTCEchelonGraph re-scored
  59. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  60. 2026-09-16 10:44 UTCEchelonGraph re-scored
  61. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  62. 2026-09-15 08:33 UTCEchelonGraph re-scored
  63. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  64. 2026-09-14 06:23 UTCEchelonGraph re-scored
  65. 2026-09-13 04:13 UTCEchelonGraph re-scored
  66. 2026-09-12 02:03 UTCEchelonGraph re-scored
  67. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  68. 2026-09-10 23:53 UTCEchelonGraph re-scored
  69. 2026-09-09 14:21 UTCEchelonGraph re-scored
  70. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  71. 2026-09-08 12:11 UTCEchelonGraph re-scored
  72. 2026-09-07 09:57 UTCEchelonGraph re-scored
  73. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile

Frequently asked(5)

What is CVE-2026-84365?
CVE-2026-84365 is a medium-severity vulnerability; its CVE record was published on September 1, 2026. Hono is a Web application framework that provides support for any JavaScript runtime. From 4.12.12 until 4.13.5, the fix released for CVE-2026-39408 does not cover every traversal sequence, and toSSG() can still write files outside the configured output directory when a route parameter contains…
When was the CVE record for CVE-2026-84365 published?
The CVE record for CVE-2026-84365 was published on September 1, 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 9, 2026; the record at its source may have been updated since.
Is CVE-2026-84365 actively exploited?
CVE-2026-84365 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-84365?
CVE-2026-84365 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-84365?
A fix for CVE-2026-84365 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-84365 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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