CVE-2026-48933: A flaw in Node.js WebCrypto implementation can crash the process if the input of `subtle.encrypt()` is a multi

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HIGH 7.5REMOTEDOWNGRADE

CVE-2026-48933 is a high-severity flaw (CVSS 7.5) affecting node.js. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw in Node.js WebCrypto implementation can crash the process if the input of `subtle.encrypt()` is a multiple of 2GiB. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.7% (top 10%)
CISA exploited list	No
Weakness	CWE-190, CWE-770
Published	2026-06-26
Last modified	2026-10-25

Publisher (CNA): HackerOne · Vendor: nodejs

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-26 02:16 UTCPublished CVE record published
2026-10-25 22:10 UTCUpdated Record last modified

nodejs node.js DOWNGRADE

Affected: 22.22.3 · 24.16.0 · 26.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 22.22.3

1. Check installed version

apt-cache policy node.js || rpm -q node.js || node.js --version

2. No fixed release: DOWNGRADE to a release before 22.22.3 (Debian / Ubuntu)

apt-cache madison node.js sudo apt install node.js=<VERSION_BEFORE_22.22.3> sudo apt-mark hold node.js

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list node.js sudo dnf downgrade node.js-<VERSION_BEFORE_22.22.3> sudo dnf versionlock add node.js

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · mingw-qt5-qtwebkit · FIXED · 5.212.0-0.46.alpha4.fc46 · FEDORA-2026-46ae541c22 · source

sudo dnf upgrade --advisory=FEDORA-2026-46ae541c22

Fedora ELN · kdominate · FIXED · 26.08.2-2.eln159 · FEDORA-2026-b1d98239fd · source

sudo dnf upgrade --advisory=FEDORA-2026-b1d98239fd

Debian 12 · nodejs · FIXED · 18.20.4+dfsg-1~deb12u3

sudo apt update && sudo apt install --only-upgrade nodejs dpkg --compare-versions "$(dpkg-query -W -f='${Version}' nodejs)" ge "18.20.4+dfsg-1~deb12u3" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · nodejs · FIXED · 20.19.2+dfsg-1+deb13u3

sudo apt update && sudo apt install --only-upgrade nodejs dpkg --compare-versions "$(dpkg-query -W -f='${Version}' nodejs)" ge "20.19.2+dfsg-1+deb13u3" && echo PATCHED || echo STILL-VULNERABLE

RHEL 10 · nodejs24 · FIXED · nodejs24-24.18.0-1.el10_2

sudo dnf upgrade --advisory=RHSA-2026:35841 rpm -q nodejs24

RHEL 10 · nodejs22 · FIXED · nodejs22-22.23.1-2.el10_2

sudo dnf upgrade --advisory=RHSA-2026:35842 rpm -q nodejs22

RHEL 10.0 Extended Update Support · nodejs22 · FIXED · nodejs22-22.23.1-2.el10_0

sudo dnf upgrade --advisory=RHSA-2026:39246 rpm -q nodejs22

RHEL 10 · nodejs26 · NO FIX YET

RHEL 9 · nodejs:26/nodejs · NO FIX YET

Alpine 3.21 · nodejs · FIXED · nodejs-22.23.0-r0

apk add --upgrade nodejs apk info -v nodejs

Alpine 3.22 · nodejs · FIXED · nodejs-22.23.0-r0

apk add --upgrade nodejs apk info -v nodejs

Alpine 3.23 · nodejs · FIXED · nodejs-24.17.0-r0

apk add --upgrade nodejs apk info -v nodejs

Alpine 3.24 · nodejs · FIXED · nodejs-24.17.0-r0

apk add --upgrade nodejs apk info -v nodejs

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-1921 · source

sudo dnf update --advisory=ALAS2023-2026-1921

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-48933?

node.js: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-48933 being exploited?

CVE-2026-48933 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-48933 affect?

CVE-2026-48933 affects node.js. Severity is high (CVSS 7.5). A flaw in Node.js WebCrypto implementation can crash the process if the input of `subtle.encrypt()` is a multiple of 2GiB. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.

How urgent is CVE-2026-48933?

Priority 54/100. High severity; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities

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References

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