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CVE-2023-26121

24
FAUCET Score

CVE-2023-26121 is a critical Prototype Pollution vulnerability affecting all versions of the safe-eval package. This flaw stems from improper sanitization within the safeEval function, allowing an attacker to manipulate object prototypes. With a CVSS score of 10.0, this vulnerability is highly severe, enabling unauthenticated remote attackers to achieve complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, its critical nature necessitates immediate attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.4.1CPE matchmatch criteria
cpe:2.3:a:safe-eval_project:safe-eval:*:*:*:*:*: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
1.11%
Probability of exploitation in next 30 days
EPSS Percentile
62.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0111 is in the 48th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-hcg3-56jf-x4vhcritical

safe-eval vulnerable to Prototype Pollution via the safeEval function

Apr 11, 2023

References

gist.github.com / seongil-wi/9d9fc0cc5b7b130419cd45827e59c4f9
ExploitThird Party Advisory
github.com / hacksparrow/safe-eval/issues/28
ExploitIssue TrackingThird Party Advisory
security.snyk.io / vuln/SNYK-JS-SAFEEVAL-3373062
ExploitThird Party Advisory