CVE-2026-73086: nanoid is a secure, URL-friendly, unique string ID generator for JavaScript

Routine

HIGH 7.4REMOTE

CVE-2026-73086 is a high-severity flaw (CVSS 7.4) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

nanoid is a secure, URL-friendly, unique string ID generator for JavaScript. Prior to versions 3.3.12 and 5.1.11, the nanoid(size) function in index.js and index.cjs coerces the user-influenced size parameter to a signed 32-bit integer, allowing a value of 2147483648 to become -2147483648 and corrupt the process-wide CSPRNG poolOffset in fillPool(), which causes subsequent session tokens, CSRF tokens, API keys, and unique identifiers to become th

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-190
Published	2026-08-11
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-08-11 17:19 UTCPublished CVE record published
2026-10-24 15:10 UTCUpdated Record last modified

Exact fixes by distribution

npm · nanoid · FIXED · 3.3.12 · vulnerable: < 3.3.12 · source

npm install nanoid@">=3.3.12" npm ls nanoid

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source

sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0

Ubuntu 22.04 · node-mocha · NOT AFFECTED

Ubuntu 24.04 · node-mocha · NOT AFFECTED

Debian 12 · node-mocha · FIXED · 9.1.4+ds1+~cs28.2.8-1

sudo apt update && sudo apt install --only-upgrade node-mocha dpkg --compare-versions "$(dpkg-query -W -f='${Version}' node-mocha)" ge "9.1.4+ds1+~cs28.2.8-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · node-mocha · FIXED · 9.1.4+ds1+~cs28.2.8-1

sudo apt update && sudo apt install --only-upgrade node-mocha dpkg --compare-versions "$(dpkg-query -W -f='${Version}' node-mocha)" ge "9.1.4+ds1+~cs28.2.8-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · node-postcss · NO FIX YET

Debian 13 · node-postcss · NO FIX YET

RHEL 10 · firefox · NOT AFFECTED

RHEL 10 · goose · DEFERRED

RHEL 10 · grafana · NOT AFFECTED

RHEL 10 · thunderbird · NOT AFFECTED

RHEL 7 · firefox · NOT AFFECTED

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-2026-73086?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-73086 being exploited?

CVE-2026-73086 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-2026-73086 affect?

CVE-2026-73086 affects affected software. Severity is high (CVSS 7.4). nanoid is a secure, URL-friendly, unique string ID generator for JavaScript. Prior to versions 3.3.12 and 5.1.11, the nanoid(size) function in index.js and index.cjs coerces the user-influenced size parameter to a signed 32-bit integer, all

How urgent is CVE-2026-73086?

Priority 36/100. High severity; Remotely exploitable, no login, no user action

References

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