CVE-2026-105862
Received Received - Intake

Stored XSS in Payload CMS via Malicious SVG Download

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: GitHub, Inc.

Description
Payload is a free and open source headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, a collection that allows downloadable SVG uploads can store a malicious SVG that bypasses sanitization and executes attacker-controlled JavaScript when a user downloads and opens the SVG. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-06
AI Q&A
2026-10-06
EPSS Evaluated
N/A
NVD
CVE-2026-105862
EUVD
EUVD-2026-93508

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
payloadcms payload < 3.90.0
payloadcms payload >= 4.0.0-canary.0, < 4.0.0-canary.34

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability affects Payload, a headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, a feature allowing SVG uploads in collections can be exploited. Attackers can upload malicious SVGs that bypass sanitization, leading to JavaScript execution when users download and open the files.

Detection Guidance

Check Payload CMS versions before 3.90.0 or canary versions before 4.0.0-canary.34. Inspect SVG uploads in collections allowing downloads for malicious JavaScript content. Review server logs for unusual SVG file downloads or access patterns.

Impact Analysis

If you use Payload CMS versions before 3.90.0 or canary versions before 4.0.0-canary.34, attackers could upload malicious SVGs to your system. When users download and open these files, attacker-controlled JavaScript executes, potentially leading to data theft, unauthorized actions, or malware delivery.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR and HIPAA requirements for data protection and access controls. Organizations using affected versions may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Upgrade Payload CMS to version 3.90.0 or 4.0.0-canary.34 or later. Remove or sanitize existing SVG uploads in affected collections. Disable SVG uploads if not required. Monitor for suspicious activity in downloadable content.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-105862. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart