CVE-2023-26140Public exploitNetwork attack vector

Cross-site scripting via unsanitized canvas links

Published Aug 16, 2023 · Updated Oct 2, 2024

Cross-site scripting in Excalidraw before 0.15.3 allows remote attackers to run script through a crafted link in a shared drawing. The Hyperlink renderer, drawing restore path, click handler, and SVG exporter used element.link as an href or navigation target without rejecting a JavaScript URI. Exploitation requires a third party to load an untrusted drawing and activate the embedded link, exposing browser-context data or actions.

CVSS severity6.1
Medium
EPSS probability0.56%
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 Excalidraw before 0.15.3 allows remote attackers to run script through a crafted link in a shared drawing. The Hyperlink renderer, drawing restore path, click handler, and SVG exporter used element.link as an href or navigation target without rejecting a JavaScript URI. Exploitation requires a third party to load an untrusted drawing and activate the embedded link, exposing browser-context data or actions.

The record

CVE
CVE-2023-26140
Published
Aug 16, 2023
Updated
Oct 2, 2024
Vendor
Excalidraw
Product
Excalidraw
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0.0.0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Excalidraw · Excalidrawversion=0.0.0 <*

Published CVSS scores

6.1GitHubCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1204.001Malicious Link

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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