What is CVE-2021-29060?

CVE-2021-29060 is a medium-severity vulnerability in Color-String Project, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2021-06-21.

How severe is CVE-2021-29060?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Color-String Project

CVE-2021-29060

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Color-String version 1.5.5 and below which occurs when the application is provided and checks a crafted invalid HWB string.

Published 2021-06-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.031 (87.5th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Color-String Project

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/yetingli/SaveResults/blob/main/js/color-string.js (Third Party Advisory)
github.com/Qix-/color-string/commit/0789e21284c33d89ebc4ab4ca6f759b9375ac9d3 (Patch, Third Party Advisory)
www.npmjs.com/package/color-string (Product)
github.com/yetingli/PoCs/blob/main/CVE-2021-29060/Color-String.md (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-29060?: CVE-2021-29060 is a medium-severity vulnerability in Color-String Project, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2021-06-21.
How severe is CVE-2021-29060?: Medium severity. CVSS v3 base score is 5.3 out of 10.