Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-26487

21
FAUCET Score

CVE-2023-26487 is a cross-site scripting (XSS) vulnerability affecting Vega, a visualization grammar, specifically within the 'lassoAppend' function. This function fails to enforce proper type checking for its first argument, allowing an attacker to supply an object with a malicious 'push' function. This can lead to XSS, with the exact impact varying based on the execution environment. The vulnerability has a CVSS score of 6.1 (MEDIUM), indicating a network-based attack requiring user interaction, with low impact on confidentiality and integrity, and no impact on availability. While the EPSS score is very low, suggesting limited exploitability, the FAUCET Risk Score is 31/100. There is currently no evidence of active exploitation, no public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage. The issue was patched in Vega version 5.23.0.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.13.1CPE matchmatch criteria
cpe:2.3:a:vega-functions_project:vega-functions:*:*:*:*:*:node.js:*:*
< 5.23.0CPE matchmatch criteria
cpe:2.3:a:vega_project:vega:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.81%
Probability of exploitation in next 30 days
EPSS Percentile
53.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0081 is in the 61st percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: vegaFixed in: 5.23.0
npmpatch availablevia ghsa
Product: vega-functionsFixed in: 5.13.1

Vendor Advisories (2)

redhatCVE-2023-26487Moderate

kibana: xss in custom visualizations

May 3, 2023
npmGHSA-w5m3-xh75-mp55medium

Vega has Cross-site Scripting vulnerability in `lassoAppend` function

Mar 2, 2023

References

github.com / vega/vega/commit/01adb034f24727d3bb321bbbb6696a7f4cd91689
Patch
github.com / vega/vega/releases/tag/v5.23.0
Release Notes
github.com / vega/vega/security/advisories/GHSA-w5m3-xh75-mp55
ExploitThird Party Advisory