Is CVE-2026-45736 in the CISA KEV catalog?

No. CVE-2026-45736 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-45736?

CVE-2026-45736 has a CVSS v3 base score of 4.4 (Moderate).

What is the EPSS score for CVE-2026-45736?

CVE-2026-45736 has an EPSS score of 0.72% (49th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-45736?

Upgrade node-ws on debian unstable to 8.20.1+~cs14.19.1-1 or later. Fixes are available for 11 affected products.

CVE & CISA-KEV Catalog

CVE-2026-45736

MEDIUM

4.4

CVSS v3

NVD

Description

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.

CWE-908 CWE-824

How to fix

Remediation Available

node-wsDebian

Fixed in:8.20.1+~cs14.19.1-1CVE-2026-45736

dotnet10Red Hat / RHEL

Fixed in:0-main@x86_64RHSA-2026:26638

Fixed in:0-main@srcRHSA-2026:26638

Fixed in:0-main@aarch64RHSA-2026:26638

dotnet10Rocky

Fixed in:0-main@aarch64RHSA-2026:26638

Fixed in:0-main@x86_64RHSA-2026:26638

Fixed in:0-main@srcRHSA-2026:26638

dotnet8Red Hat / RHEL

Fixed in:0-main@x86_64RHSA-2026:26994

Fixed in:0-main@srcRHSA-2026:26994

Fixed in:0-main@aarch64RHSA-2026:26994

dotnet8Rocky

Fixed in:0-main@aarch64RHSA-2026:26994

Fixed in:0-main@x86_64RHSA-2026:26994

Fixed in:0-main@srcRHSA-2026:26994

dotnet9Red Hat / RHEL

Fixed in:0-main@aarch64RHSA-2026:27171

Fixed in:0-main@x86_64RHSA-2026:27171

Fixed in:0-main@srcRHSA-2026:27171

dotnet9Rocky

Fixed in:0-main@aarch64RHSA-2026:27171

Fixed in:0-main@x86_64RHSA-2026:27171

Fixed in:0-main@srcRHSA-2026:27171

registry.redhat.io/discovery/discoveryRed Hat / RHEL

Fixed in:server-rhel9@sha256:6a26bc89c61e7fad594399ceda8e170d66fa241d818eada7a12d9fec6bb08ecc_amd64RHSA-2026:29197

Fixed in:ui-rhel9@sha256:16b33ed961e598805d155db8fea7bb293fb8ef95ddd45169c61fbeb5a8944b6b_amd64RHSA-2026:29197

Fixed in:server-rhel9@sha256:ccd969d2710875e82896556e7b3c02e39147d03612452af6b0a916b656ce5b34_arm64RHSA-2026:29197

Fixed in:ui-rhel9@sha256:335f5d49155804969d193c3104fd144d7e499e2d5433965b217f379cbcf1cc75_arm64RHSA-2026:29197

registry.redhat.io/discovery/discoveryRocky

Fixed in:server-rhel9@sha256:6a26bc89c61e7fad594399ceda8e170d66fa241d818eada7a12d9fec6bb08ecc_amd64RHSA-2026:29197

Fixed in:ui-rhel9@sha256:16b33ed961e598805d155db8fea7bb293fb8ef95ddd45169c61fbeb5a8944b6b_amd64RHSA-2026:29197

Fixed in:server-rhel9@sha256:ccd969d2710875e82896556e7b3c02e39147d03612452af6b0a916b656ce5b34_arm64RHSA-2026:29197

Fixed in:ui-rhel9@sha256:335f5d49155804969d193c3104fd144d7e499e2d5433965b217f379cbcf1cc75_arm64RHSA-2026:29197

registry.redhat.io/rhdh/rhdhRed Hat / RHEL

Fixed in:hub-rhel9@sha256:044d2d72c21329826c144d9b55c381576a421188139de0fed693e74997665d2c_amd64RHSA-2026:33574

Fixed in:rhel9-operator@sha256:219babfcc89ae903edf35022aae79ba1d1b326386978db8ff267e24e50f9a785_amd64RHSA-2026:33574

Fixed in:operator-bundle@sha256:66fb23e8dbced7bb187928fb38562ae9e2649265d56f745044dd5e79b4209893_amd64RHSA-2026:33574

registry.redhat.io/rhdh/rhdhRocky

Fixed in:hub-rhel9@sha256:044d2d72c21329826c144d9b55c381576a421188139de0fed693e74997665d2c_amd64RHSA-2026:33574

Fixed in:rhel9-operator@sha256:219babfcc89ae903edf35022aae79ba1d1b326386978db8ff267e24e50f9a785_amd64RHSA-2026:33574

Fixed in:operator-bundle@sha256:66fb23e8dbced7bb187928fb38562ae9e2649265d56f745044dd5e79b4209893_amd64RHSA-2026:33574

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.72%probability of exploitation in 30 days

49thpercentile

Moderate risk: more likely to be exploited than 49% of all known CVEs.

References

Patch2

Other references9

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-01.