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CVE Record

CVE-2021-29060: A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Color-String version 1.5.5 a...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-29060 is a denial-of-service issue in the JavaScript color-string package. If an application parses attacker-controlled invalid HWB color strings with affected versions, processing can become expensive and disrupt service. The source bundle does not provide CVSS, CWE, or active exploitation evidence.

Executive priority

Treat as a targeted availability risk, not a confirmed breach indicator. Prioritize internet-facing or multi-tenant services that parse user-supplied color values, because ReDoS can tie up runtime resources and degrade customer-facing availability.

Technical view

Color-String 1.5.5 and below has a regular expression denial-of-service flaw in HWB string validation/parsing. Crafted invalid HWB input may cause excessive regex processing. Evidence includes the CVE description, a public PoC reference, and a fixing commit, but product metadata and severity scoring are incomplete.

Likely exposure

Likely exposure is Node.js or JavaScript applications that directly or transitively depend on color-string 1.5.5 or below and parse untrusted color input. Risk is lower where color values are static, build-time only, or fully controlled by trusted authors.

Exploitation context

The bundle references a public PoC and a fixing commit, but KEV is false and no cited source states active exploitation. Exploitability depends on whether untrusted invalid HWB strings can reach the vulnerable parser on a service path.

Researcher notes

The public record is thin: no CVSS, no CWE, sparse affected metadata, and no KEV listing. The strongest evidence is the CVE description, public PoC reference, and upstream commit. Avoid assuming broader package ecosystems or active exploitation without additional vendor or telemetry evidence.

Mitigation direction

  • Inventory direct and transitive color-string dependencies.
  • Check vendor and npm guidance for the fixed package version.
  • Upgrade affected color-string versions beyond 1.5.5 where available.
  • Restrict or validate untrusted color input before parsing.
  • Prioritize services where parsing occurs during request handling.

Validation and detection

  • Review lockfiles and SBOMs for color-string versions.
  • Trace whether user-controlled input reaches HWB parsing.
  • Confirm deployed artifacts use the remediated dependency version.
  • Test service resilience with safe, non-offensive malformed input cases.
  • Document any accepted residual exposure and compensating controls.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2021-29060 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.