CVE-2026-5533Public exploitNetwork attack vector

Script execution via unsanitized SVG artifact rendering

Published Apr 5, 2026 · Updated Apr 5, 2026

Stored cross-site scripting in Pi 0.58.4 allows remote attackers to run script in the web UI through a crafted SVG artifact. SvgArtifact.ts passes LLM-generated SVG content to unsafeHTML() without sanitization or an iframe sandbox, inserting scripts and event handlers into the parent DOM. Exploitation requires the crafted artifact to be rendered, after which injected code can alter page content and act with the web UI's browser privileges.

CVSS severity4.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored cross-site scripting in Pi 0.58.4 allows remote attackers to run script in the web UI through a crafted SVG artifact. SvgArtifact.ts passes LLM-generated SVG content to unsafeHTML() without sanitization or an iframe sandbox, inserting scripts and event handlers into the parent DOM. Exploitation requires the crafted artifact to be rendered, after which injected code can alter page content and act with the web UI's browser privileges.

The record

CVE
CVE-2026-5533
Published
Apr 5, 2026
Updated
Apr 5, 2026
Vendor
Earendil Inc.
Product
Pi
Classifications
CWE-79, CWE-94, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 5, 2026Record 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=0.58.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Earendil Inc. · Piversion=0.58.4

Published CVSS scores

5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

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')
CWE-94Improper Control of Generation of Code ('Code Injection')
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo