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CVE-2021-41167

24
FAUCET Score

CVE-2021-41167 affects the modern-async JavaScript library, specifically its forEachSeries and forEachLimit functions, which fail to properly limit concurrency as intended. This vulnerability carries a CVSS score of 7.5 (High) due to its potential for denial of service (A:H) through network-based attacks (AV:N) with low attack complexity (AC:L). There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.4CPE matchmatch criteria
cpe:2.3:a:modern-async_project:modern-async:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.62%
Probability of exploitation in next 30 days
EPSS Percentile
73.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0162 is in the 56th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: modern-asyncFixed in: 1.0.4

Vendor Advisories (1)

npmGHSA-3pcq-34w5-p4g2high

modern-async's `forEachSeries` and `forEachLimit` functions do not limit the number of requests

Oct 21, 2021

References

github.com / nicolas-van/modern-async/commit/0010d28de1b15d51db3976080e26357fa7144436
PatchThird Party Advisory
github.com / nicolas-van/modern-async/issues/5
ExploitIssue TrackingPatchThird Party Advisory
github.com / nicolas-van/modern-async/security/advisories/GHSA-3pcq-34w5-p4g2
Third Party Advisory