CVE-2023-26487Public exploitNetwork attack vector

Browser script execution via unchecked lasso object

Published Mar 3, 2023 · Updated Feb 25, 2025

Cross-site scripting in Vega before 5.23.0 allows remote attackers to execute browser-context JavaScript through a crafted visualization. The lassoAppend expression function accepts a non-array first argument and calls its attacker-supplied push property with coordinate values. A victim must render and interact with the crafted specification; resulting code runs with the embedding page's browser privileges.

CVSS severity6.5
Medium
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Vega before 5.23.0 allows remote attackers to execute browser-context JavaScript through a crafted visualization. The lassoAppend expression function accepts a non-array first argument and calls its attacker-supplied push property with coordinate values. A victim must render and interact with the crafted specification; resulting code runs with the embedding page's browser privileges.

The record

CVE
CVE-2023-26487
Published
Mar 3, 2023
Updated
Feb 25, 2025
Vendor
Vega
Product
Vega
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.23.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vega · Vegaversion=< 5.23.0

Published CVSS scores

6.5GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.1OSVCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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