CVE-2026-14181

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (43rd 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

Also known asEUVD-2026-40947 (ENISA EUVD)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: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

@fastify/middie versions 9.1.0 through 9.3.2 fail to guard the URL normalization step used by the standalone engine when incoming request paths contain malformed percent-encoded sequences. Inputs such as an incomplete percent escape or a truncated multibyte sequence cause the underlying decoder to throw synchronously, and the exception escapes the middie normalize step and terminates the Node.js process. The bypass affects applications that call middie.run directly on the standalone engine API, causing an immediate denial of service for all connected clients until restart. Applications using the Fastify plugin path are not affected because Fastifys error handler catches the exception. Patches: upgrade to @fastify/middie 9.3.3. Workarounds: migrate from the standalone engine API to the Fastify plugin path, where the framework error handler catches the exception.

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.
Exploitation0.5% × 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: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
43rd
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.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). 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).

The CVE record names the fixed release. 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

July 1, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jul 1, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

@fastify/middie standalone engine vulnerable to Denial of Service via malformed percent-encoded paths · Advisory · fastify/middie · GitHub

https://github.com/fastify/middie/security/advisories/GHSA-qcc9-jh8q-47vh
Web page

Security Advisories | OpenJS Foundation CVE Numbering Authority

https://cna.openjsf.org/security-advisories.html

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 173 rows 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 73 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:51 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
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  3. 2026-11-11 19:39 UTCEchelonGraph re-scored
  4. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
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  10. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  12. 2026-11-04 03:31 UTCEchelonGraph re-scored
  13. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
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  16. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
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  20. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-27 11:22 UTCEchelonGraph re-scored
  22. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  24. 2026-10-25 14:48 UTCEchelonGraph re-scored
  25. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  1. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  6. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-10-18 05:02 UTCEchelonGraph re-scored
  8. 2026-10-17 18:25 UTCEchelonGraph re-scored
  9. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  13. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-10-13 16:24 UTCOSV refresh
  15. 2026-10-12 16:34 UTCEchelonGraph re-scored
  16. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-10-11 20:11 UTCEchelonGraph re-scored
  18. 2026-10-11 18:23 UTCEchelonGraph re-scored
  19. 2026-10-11 14:56 UTCEchelonGraph re-scored
  20. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  34. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  35. 2026-09-23 06:56 UTCEchelonGraph re-scored
  36. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  37. 2026-09-18 06:37 UTCEchelonGraph re-scored
  38. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  40. 2026-09-14 00:27 UTCEchelonGraph re-scored
  41. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  42. 2026-09-13 09:09 UTCEchelonGraph re-scored
  43. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  45. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  50. 2026-09-06 14:27 UTCEchelonGraph re-scored
  51. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  52. 2026-09-06 02:39 UTCEchelonGraph re-scored
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  57. 2026-08-31 00:12 UTCEchelonGraph re-scored
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  60. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.5% · 40th percentile
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  62. 2026-08-27 22:28 UTCEchelonGraph re-scored
  63. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.5% · 40th percentile
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  65. 2026-08-24 21:02 UTCEchelonGraph re-scored
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  67. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 21st percentile
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  75. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile

Frequently asked(5)

What is CVE-2026-14181?
CVE-2026-14181 is a high-severity vulnerability; its CVE record was published on July 1, 2026. @fastify/middie versions 9.1.0 through 9.3.2 fail to guard the URL normalization step used by the standalone engine when incoming request paths contain malformed percent-encoded sequences. Inputs such as an incomplete percent escape or a truncated multibyte sequence cause the underlying decoder to…
When was the CVE record for CVE-2026-14181 published?
The CVE record for CVE-2026-14181 was published on July 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 July 2, 2026; the record at its source may have been updated since.
Is CVE-2026-14181 actively exploited?
CVE-2026-14181 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-14181?
CVE-2026-14181 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-2026-14181?
The CVE record for CVE-2026-14181 names the fix: "Patches: upgrade to @fastify/middie 9.3.3."

Dependency Blast Radius

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