CVE-2026-45736

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.7% (54th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 4.4 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-05-18) is not newer than that change (2026-10-26), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekElevated

Also known asEUVD-2026-30543 (ENISA EUVD) · GHSA-58qx-3vcg-4xpx (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (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: 0.7%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

ws is an open source WebSocket client and server for Node.js. Prior to 8.20.1, the websocket.close() implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. This vulnerability is fixed in 8.20.1.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
50
EG Risk 50/100

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.
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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.7%
EPSS %ILE
54th
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.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.7% 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; 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.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).

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

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.

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 15, 2026

Last Modified

October 26, 2026

Advisory Details (2)

Auto-updated May 16, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Uninitialized memory disclosure · Advisory · websockets/ws · GitHub

https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx
Web page

[security] Fix uninitialized memory disclosure in `websocket.close()` · websockets/ws@c0327ec · GitHub

https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhoai/odh-mod-arch-eval-hub-rhel9:17918612142026-10-19redhat
redhatrhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9:17900139052026-09-30redhat
redhatrhtas/rekor-search-ui-rhel9:17897258182026-09-23redhat
redhatws2026-09-10redhat
redhatrhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9:17878015272026-09-08redhat
redhatrhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9:17871213872026-08-27redhat
redhatrh-podman-desktop-0:1.1.2-1.el10_22026-08-20redhat
redhatodf4/rook-ceph-rhel9-operator:17866295482026-08-19redhat
redhatodf4/rook-ceph-rhel9-operator:17870615542026-08-19redhat
redhatodf4/rook-ceph-rhel9-operator:17867068802026-08-18redhat
redhatodf4/rook-ceph-rhel9-operator:17867031432026-08-18redhat
redhatopenshift4/ose-agent-installer-ui-rhel9:17852301472026-08-04redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17846701012026-07-29redhat
redhatcryostat/cryostat-openshift-console-plugin-rhel9:4.2.0-132026-07-29redhat
redhatopenshift4/ose-agent-installer-ui-rhel9:17847137412026-07-28redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17847308572026-07-28redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17841275532026-07-21redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17841449362026-07-21redhat
redhatrhmtc/openshift-migration-ui-rhel8:17836905322026-07-20redhat
redhatrhtas/rekor-search-ui-rhel9:17833271852026-07-09redhat
redhatdevspaces/dashboard-rhel9:17824987922026-07-08redhat
redhatrhdh/rhdh-hub-rhel9:17834481842026-07-08redhat
redhatansible-automation-platform-26/gateway-rhel9:17827615102026-07-01redhat
redhatrhdh/rhdh-hub-rhel9:17827612442026-06-30redhat
redhatdiscovery/discovery-ui-rhel9:17821669522026-06-24redhat
redhatdotnet9-0-main-9.0.118-1.hum12026-06-19redhat
redhatdotnet8-0-main-8.0.128-1.hum12026-06-18redhat
redhatdotnet10-0-main-10.0.109-1.hum12026-06-17redhat
redhatyarnpkg-main-1.22.22-18.1.hum12026-04-11redhat
npmws @ 8.20.1 (fixes >= 8.0.0, < 8.20.1)—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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
node-ws7.4.2+~cs18.0.8-2 ... 8.8.1+~cs13.7.3-1 (17 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
node-ws8.11.0+~cs13.7.3-1 ... 8.21.3+~cs14.19.1-1 (10 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
node-ws8.18.1+~cs14.18.2-1 ... 8.21.3+~cs14.19.1-1 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-ws8.18.1+~cs14.18.2-1, 8.19.0+~cs14.19.1-1
  • every version up to 8.20.1+~cs14.19.1-1: fixed in 8.20.1+~cs14.19.1-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
ws—
  • 8.0.0 up to 8.20.1: fixed in 8.20.1
—

Weakness Classification(2)

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

Additional Vendor Advisories

(9)

Data Freshness Timeline

(refreshed 14× in last 7d / 47× 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 300 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 200 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 23:42 UTCEG score recompute
  2. 2026-11-01 23:42 UTCVendor advisory
  3. 2026-11-01 23:42 UTCGHSA enrichmentGHSA-58qx-3vcg-4xpx · GitHub severity MODERATE · GitHub CVSS 4.4
  4. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  5. 2026-11-01 07:48 UTCGHSA enrichmentGHSA-58qx-3vcg-4xpx · GitHub severity MODERATE · GitHub CVSS 4.4
  6. 2026-11-01 07:48 UTCEG score recompute
  7. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  8. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  9. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  10. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  11. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  12. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  13. 2026-10-26 14:32 UTCEG score recompute
  14. 2026-10-26 14:32 UTCVendor advisory
  15. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  16. 2026-10-25 14:26 UTCEG score recompute
  17. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-10-23 23:56 UTCEG score recompute
  19. 2026-10-23 23:56 UTCVendor advisory
  20. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  22. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  24. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  25. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
Show 75 more
  1. 2026-10-18 03:37 UTCEG score recompute
  2. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  3. 2026-10-17 13:35 UTCEG score recompute
  4. 2026-10-17 13:35 UTCVendor advisory
  5. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  8. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-10-12 16:04 UTCEG score recompute
  11. 2026-10-11 19:46 UTCEG score recompute
  12. 2026-10-11 17:00 UTCEG score recompute
  13. 2026-10-11 14:26 UTCEG score recompute
  14. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  22. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  24. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  25. 2026-09-30 07:28 UTCOSV refresh
  26. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  27. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  28. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  29. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  30. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  31. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  32. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  33. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  34. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  35. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  36. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  37. 2026-09-11 13:24 UTCVendor advisory
  38. 2026-09-11 12:21 UTCEG score recompute
  39. 2026-09-11 12:21 UTCVendor advisory
  40. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  41. 2026-09-10 13:40 UTCVendor advisory
  42. 2026-09-10 12:26 UTCEG score recompute
  43. 2026-09-10 12:26 UTCVendor advisory
  44. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  45. 2026-09-09 13:41 UTCVendor advisory
  46. 2026-09-09 12:39 UTCEG score recompute
  47. 2026-09-09 12:39 UTCVendor advisory
  48. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  49. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  50. 2026-09-07 13:53 UTCVendor advisory
  51. 2026-09-07 12:42 UTCEG score recompute
  52. 2026-09-07 12:42 UTCVendor advisory
  53. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  54. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  55. 2026-09-03 12:29 UTCEG score recompute
  56. 2026-09-03 12:29 UTCVendor advisory
  57. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  58. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  59. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  60. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  61. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  62. 2026-08-28 16:47 UTCVendor advisory
  63. 2026-08-28 16:00 UTCEG score recompute
  64. 2026-08-28 16:00 UTCVendor advisory
  65. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  66. 2026-08-26 16:10 UTCEG score recompute
  67. 2026-08-26 16:10 UTCVendor advisory
  68. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  69. 2026-08-26 12:21 UTCEG score recompute
  70. 2026-08-26 12:21 UTCVendor advisory
  71. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  72. 2026-08-25 13:24 UTCVendor advisory
  73. 2026-08-25 12:20 UTCEG score recompute
  74. 2026-08-25 12:20 UTCVendor advisory
  75. 2026-08-24 13:29 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-45736?
CVE-2026-45736 is a high-severity vulnerability; its CVE record was published on May 15, 2026. ws is an open source WebSocket client and server for Node.js. Prior to 8.20.1, the websocket.close() implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. This vulnerability is fixed in 8.20.1.
When was the CVE record for CVE-2026-45736 published?
The CVE record for CVE-2026-45736 was published on May 15, 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-2026-45736 actively exploited?
CVE-2026-45736 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45736?
CVE-2026-45736 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-45736?
A fix for CVE-2026-45736 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-45736 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-45736

Explore →

Is Your Infrastructure Affected by CVE-2026-45736?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.