CVE-2026-46416

MEDIUMNVD 6.36.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.3 under NVD CVSS v3. EPSS exploit probability: 0.3% (24th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated

Also known asEUVD-2026-32676 (ENISA EUVD)Source: ENISA EUVD

6.3EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.3Exploit: No code on recordExposed services: Not assessed

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

Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO creates one shared UFOWebSocketHandler instance and reuses it for multiple authenticated WebSocket connections. The handler stores per-connection protocol objects in mutable instance fields. Each new WebSocket connection overwrites those fields. Later, message handlers send responses through the shared fields instead of through protocol objects bound to the originating connection. As a result, the most recently connected authenticated client can receive protocol responses that belong to another authenticated client.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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)
Severity63% × 45%
Impact severity (EG Severity): CVSS 6.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (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: No fix is confirmed yet. Check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule.
EPSS PROB
0.3%
EPSS %ILE
24th
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 (6.3): severity, escalated by confirmed exploitation. This CVE's 6.3 is its impact severity (EG Severity), not escalated.

EG Severity
6.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS. 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; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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; Track* at high (mission-essential systems).

No fix is confirmed yet. Check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule.

Exploitation public PoC (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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

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

May 27, 2026

Last Modified

October 26, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
No fix on record yet. Sources: github.
GitHub advisoryMentions a patch (unverified)

UFO shared WebSocket handler state causes cross-client response hijacking · Advisory · microsoft/UFO · GitHub

https://github.com/microsoft/UFO/security/advisories/GHSA-cwwh-p9rv-4pj4

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× 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 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 100 of 195 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. None are among the latest 100 rows. The 95 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.3% · 24th percentile
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  3. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
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  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  9. 2026-10-26 12:26 UTCEG score recompute
  10. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-10-22 23:23 UTCEG score recompute
  15. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-10-18 03:37 UTCEG score recompute
  21. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 37th percentile
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  24. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  25. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
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  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  2. 2026-10-12 16:02 UTCEG score recompute
  3. 2026-10-11 19:45 UTCEG score recompute
  4. 2026-10-11 17:00 UTCEG score recompute
  5. 2026-10-11 14:25 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  9. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  11. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  13. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  17. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  19. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  20. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  21. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 20th percentile
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  25. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  26. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  27. 2026-09-14 07:32 UTCEG score recompute
  28. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  29. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  30. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  37. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  38. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  39. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  40. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  42. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  43. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  44. 2026-08-25 05:09 UTCEG score recompute
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  46. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  47. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  48. 2026-08-21 20:28 UTCEG score recompute
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  51. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  52. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
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  54. 2026-08-17 09:09 UTCEG score recompute
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  56. 2026-08-16 02:43 UTCEG score recompute
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  59. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  61. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  63. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  66. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  68. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  71. 2026-08-08 13:49 UTCEG score recompute
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  73. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  74. 2026-08-05 20:50 UTCEG score recompute
  75. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile

Frequently asked(5)

What is CVE-2026-46416?
CVE-2026-46416 is a medium-severity vulnerability; its CVE record was published on May 27, 2026. Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO creates one shared UFOWebSocketHandler instance and reuses it for multiple authenticated WebSocket connections. The handler stores per-connection protocol objects in…
When was the CVE record for CVE-2026-46416 published?
The CVE record for CVE-2026-46416 was published on May 27, 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 October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-46416 actively exploited?
CVE-2026-46416 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-46416?
CVE-2026-46416 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-46416?
No fix for CVE-2026-46416 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix.

Dependency Blast Radius

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