CVE-2026-76169

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 2026-09-30. 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

Also known asEUVD-2026-70988 (ENISA EUVD) · GHSA-p68q-wchp-6fh7 (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: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

fastify versions >= 4.0.0 and before 5.12.2 can route a malformed URL sent under one plugin prefix to the custom not-found handler of a different sibling plugin, and invoke it without the preHandler hook declared for that handler. The internal not-found router for encapsulated handlers dispatches malformed paths through a single shared handler pointer before URL decoding, ignoring the prefix and skipping the selected handler's normal lifecycle. An unauthenticated attacker can therefore reach an authentication-protected private fallback through an unrelated public prefix and read its full response, bypassing the authentication hook and breaking prefix encapsulation. Users should upgrade to fastify 5.12.2 or later.

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: 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
0.5%
EPSS %ILE
45th
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
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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 4, 2026

Last Modified

September 15, 2026

Advisory Details (2)

Auto-updated Sep 4, 2026
Patch available. Sources: github.
Web page

Security Advisories | OpenJS Foundation CVE Numbering Authority

https://cna.openjsf.org/security-advisories.html
GitHub advisoryMentions a patch (unverified)

fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers · Advisory · fastify/fastify · GitHub

https://github.com/fastify/fastify/security/advisories/GHSA-p68q-wchp-6fh7

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatdevspaces/dashboard-rhel9:17919455402026-10-26redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17919459402026-10-21redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17918534322026-10-21redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17918609182026-10-19redhat
npmfastify @ 5.12.2 (fixes >= 4.0.0, < 5.12.2)—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
fastify—
  • 4.0.0 up to 5.12.2: fixed in 5.12.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 38× 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 121 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 21 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 08:16 UTCEchelonGraph re-scored
  2. 2026-11-13 08:16 UTCVendor advisory
  3. 2026-11-13 08:16 UTCGHSA enrichmentGHSA-p68q-wchp-6fh7 · GitHub severity HIGH · GitHub CVSS 7.5
  4. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  5. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  6. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  7. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  8. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  9. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  10. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  11. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  12. 2026-11-05 15:38 UTCEchelonGraph re-scored
  13. 2026-11-05 15:38 UTCVendor advisory
  14. 2026-11-05 15:38 UTCGHSA enrichmentGHSA-p68q-wchp-6fh7 · GitHub severity HIGH · GitHub CVSS 7.5
  15. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  17. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  18. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  19. 2026-11-01 07:39 UTCGHSA enrichmentGHSA-p68q-wchp-6fh7 · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-11-01 07:39 UTCEchelonGraph re-scored
  21. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  22. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  23. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  24. 2026-10-28 23:03 UTCEchelonGraph re-scored
  25. 2026-10-28 23:03 UTCVendor advisory
Show 75 more
  1. 2026-10-28 20:25 UTCOSV refresh
  2. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  4. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  6. 2026-10-25 14:02 UTCEchelonGraph re-scored
  7. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-21 00:00 UTCEchelonGraph re-scored
  12. 2026-10-21 00:00 UTCVendor advisory
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-10-18 03:13 UTCEchelonGraph re-scored
  17. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-13 07:13 UTCEchelonGraph re-scored
  23. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-10-12 15:38 UTCEchelonGraph re-scored
  25. 2026-10-11 19:24 UTCEchelonGraph re-scored
  26. 2026-10-11 16:40 UTCEchelonGraph re-scored
  27. 2026-10-11 13:59 UTCEchelonGraph re-scored
  28. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  29. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  30. 2026-10-09 23:15 UTCEchelonGraph re-scored
  31. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  32. 2026-10-09 01:17 UTCEchelonGraph re-scored
  33. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  34. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  35. 2026-10-07 02:09 UTCEchelonGraph re-scored
  36. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  37. 2026-10-06 01:37 UTCEchelonGraph re-scored
  38. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  39. 2026-10-05 01:19 UTCEchelonGraph re-scored
  40. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  41. 2026-10-04 00:58 UTCEchelonGraph re-scored
  42. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  43. 2026-10-02 19:41 UTCEchelonGraph re-scored
  44. 2026-10-02 07:38 UTCEchelonGraph re-scored
  45. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  46. 2026-09-30 19:00 UTCEchelonGraph re-scored
  47. 2026-09-30 02:45 UTCEchelonGraph re-scored
  48. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  49. 2026-09-29 04:20 UTCEchelonGraph re-scored
  50. 2026-09-28 16:17 UTCEchelonGraph re-scored
  51. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  52. 2026-09-27 16:05 UTCEchelonGraph re-scored
  53. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  54. 2026-09-27 04:03 UTCEchelonGraph re-scored
  55. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  56. 2026-09-26 02:50 UTCEchelonGraph re-scored
  57. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  58. 2026-09-24 23:17 UTCEchelonGraph re-scored
  59. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  60. 2026-09-23 22:25 UTCEchelonGraph re-scored
  61. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  62. 2026-09-22 22:21 UTCEchelonGraph re-scored
  63. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  64. 2026-09-21 22:13 UTCEchelonGraph re-scored
  65. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  66. 2026-09-20 22:07 UTCEchelonGraph re-scored
  67. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  68. 2026-09-19 21:59 UTCEchelonGraph re-scored
  69. 2026-09-18 21:30 UTCEchelonGraph re-scored
  70. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  71. 2026-09-17 21:25 UTCEchelonGraph re-scored
  72. 2026-09-16 21:19 UTCEchelonGraph re-scored
  73. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  74. 2026-09-16 09:02 UTCEchelonGraph re-scored
  75. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 43rd percentile

Frequently asked(5)

What is CVE-2026-76169?
CVE-2026-76169 is a high-severity vulnerability; its CVE record was published on September 4, 2026. fastify versions >= 4.0.0 and before 5.12.2 can route a malformed URL sent under one plugin prefix to the custom not-found handler of a different sibling plugin, and invoke it without the preHandler hook declared for that handler. The internal not-found router for encapsulated handlers dispatches…
When was the CVE record for CVE-2026-76169 published?
The CVE record for CVE-2026-76169 was published on September 4, 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 15, 2026; the record at its source may have been updated since.
Is CVE-2026-76169 actively exploited?
CVE-2026-76169 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76169?
CVE-2026-76169 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-2026-76169?
A fix for CVE-2026-76169 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76169 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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