HIGH

CVE-2026-73086

CVSS v3

7.4

HIGH

EPSS Score

0.3 %

exploit probability, as of 2026-10-17

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

nanoidnpmfrom 4.0.0 · fixed in 5.1.11

Vendor advisories

CVE-2026-73086 Red Hat Product Security144 products fixed · 43 known affected
nanoid: nanoid: Predictable ID generation due to integer overflow
rhmtc/openshift-migration-ui-rhel8 as a component of Migration Toolkit for Containers · workload-availability/node-healthcheck-must-gather-rhel9 as a component of Node HealthCheck Operator · workload-availability/node-healthcheck-operator-bundle as a component of Node HealthCheck Operator
RHSA-2026:83598 Red Hat Product Security1 product fixed
Red Hat Security Advisory: RHTAS 1.4.4 - Red Hat Trusted Artifact Signer Release
RHSA-2026:74609 Red Hat Product Security4 products fixed
Red Hat Security Advisory: Cluster Observability Operator 1.5.3
RHSA-2026:74503 Red Hat Product Security15 products fixed
Red Hat Security Advisory: Satellite 6.19.5 Async Update
RHSA-2026:71179 Red Hat Product Security4 products fixed
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
RHSA-2026:71113 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update

37 more advisories

Full record on NVD

Description

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 the deterministic string "uuuuuuuuuuuuuuuuuuuuu" until the process restarts. This issue is fixed in versions 3.3.12 and 5.1.11.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: 2026-08-11
Last Modified: 2026-08-12

Frequently asked questions

What is CVE-2026-73086?

Is CVE-2026-73086 actively exploited?

Active exploitation of CVE-2026-73086 has not been confirmed. Its EPSS score was 0.3% on 2026-10-17, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-73086?

CVE-2026-73086 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

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