CVE-2026-86738

Snipe-IT versions before 8.7.0 contain a CSS injection vulnerability in the Custom CSS field due to incomplete sanitization that reverses HTML encoding on greater-than and double-quote characters. Superusers can plant malicious CSS payloads using @import and url() references to exfiltrate CSRF tokens from other superusers via attribute-selector rules, enabling account takeover.

• CWE-79

• https://github.com/grokability/snipe-it/commit/d26d71688359707f3b257fc04fe6c3e5a17405f9Patch
• https://github.com/grokability/snipe-it/security/advisories/GHSA-pvcw-mp8q-mj39Patch, Vendor Advisory
• https://www.vulncheck.com/advisories/snipe-it-before-8.7.0-css-injection-via-custom-cssPatch, Third Party Advisory

Published

Sep 8, 2026

Last Modified

Sep 9, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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