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CVE-2021-39157

24
FAUCET Score

CVE-2021-39157 describes a denial-of-service vulnerability in the detect-character-encoding library, affecting versions 0.6.0 and earlier. Specifically, providing data that does not match any known character set can cause the Node.js process to crash. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating a network-exploitable flaw with low attack complexity and a high impact on availability, as it can lead to a system crash. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE. Users are advised to upgrade to version 0.7.0 or later to mitigate this issue, as no workarounds are available.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.7.0CPE matchmatch criteria
cpe:2.3:a:detect-character-encoding_project:detect-character-encoding:*:*:*:*:*: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
2.07%
Probability of exploitation in next 30 days
EPSS Percentile
79.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0207 is in the 64th percentile among its peer group of 51,506 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: detect-character-encodingFixed in: 0.7.0

Vendor Advisories (1)

npmGHSA-jqfh-8hw5-fqjrhigh

Improper Handling of Exceptional Conditions in detect-character-encoding

Aug 25, 2021

References

github.com / sonicdoe/detect-character-encoding/commit/992a11007fff6cfd40b952150ab8d30410c4a20a
PatchThird Party Advisory
github.com / sonicdoe/detect-character-encoding/issues/15
ExploitThird Party Advisory
github.com / sonicdoe/detect-character-encoding/security/advisories/GHSA-jqfh-8hw5-fqjr
ExploitThird Party Advisory