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CVE-2023-40185

23
FAUCET Score

CVE-2023-40185 is a high-severity vulnerability affecting the Shescape JavaScript library, specifically when used on Windows in a threaded context. The flaw allows attackers to bypass security protections by causing Shescape to escape or quote for an incorrect shell, depending on the expected and actual shell used. With a CVSS score of 8.6, this vulnerability has a network attack vector, low attack complexity, and a high impact on integrity. While a patch is available in version 1.7.4, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.7.4CPE matchmatch criteria
cpe:2.3:a:shescape_project:shescape:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
3.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.56%
Probability of exploitation in next 30 days
EPSS Percentile
43.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0056 is in the 20th percentile among its peer group of 51,553 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: shescapeFixed in: 1.7.4

Vendor Advisories (1)

npmGHSA-j55r-787p-m549high

Shescape on Windows escaping may be bypassed in threaded context

Aug 22, 2023

References

github.com / ericcornelissen/shescape/commit/0b976dab645abf45ffd85e74a8c6e51ee2f42d63
Patch
github.com / ericcornelissen/shescape/pull/1142
Patch
github.com / ericcornelissen/shescape/releases/tag/v1.7.4
Release Notes
github.com / ericcornelissen/shescape/security/advisories/GHSA-j55r-787p-m549
ExploitPatchVendor Advisory