7.4

CVE-2026-73086: nanoid: Integer Overflow or Wraparound

Deferred
AliasesRHSA-2026:54412UBUNTU-CVE-2026-73086DEBIAN-CVE-2026-73086
Published 11-08-2026Last modified 12-08-2026

Vulnerability summary

CVE-2026-73086 is a high (CVSS 7.4) Integer Overflow or Wraparound vulnerability in ai nanoid. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 22.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.4 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 2
OPENSUSE-SU-2026:11680-1OPENSUSE-SU-2026:12070-1RHSA-2026:48758RHSA-2026:50287RHSA-2026:54518RHSA-2026:54520

Timeline

  1. 11-08-2026
    PublishedVulnerability first disclosed.
  2. 12-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

8 scores · 8 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.30% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard23 products
  • airflow-2All versions (No fix recorded)
  • airflow-core-2All versions (No fix recorded)
  • authentik-fips-2025.12All versions (No fix recorded)
  • commercial-gitlab-rails-ee-19.1< 19.1.7-r3
  • commercial-gitlab-rails-ee-19.2< 19.2.7-r1
Debian2 products
  • node-mocha< 9.1.4+ds1+~cs28.2.8-1
  • node-postcssAll versions (No fix recorded) | < 8.5.14+~cs9.3.34-1
Ubuntu2 products
  • node-mochaAll versions (No fix recorded)
  • node-postcssAll versions (No fix recorded)
Ai1 product
  • nanoid< 3.3.12 | ≥ 4.0.0, < 5.1.11
Npm1 product
  • nanoid< 3.3.12 | ≥ 4.0.0, < 5.1.11
Redhat1 product
  • grafana13.1< 0:13.1.3-0.1.hum1
Wolfi1 product
  • jupyter-base-notebook< 7.6.3-r2

7 vendors · 31 products

References

18 links
Show all 18 references