XSS in Grokability Snipe-It
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/grokability/snipe-it/security/advisories/GHSA-pvcw-mp8q-mj39 (vendor-advisory, Patch, Vendor Advisory)
- github.com/grokability/snipe-it/commit/d26d71688359707f3b257fc04fe6c3e5a17405f9 (Patch, patch)
- www.vulncheck.com/advisories/snipe-it-before-8.7.0-css-injection-via-custom-css (Patch, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-86738?
- CVE-2026-86738 is a high-severity vulnerability in Grokability Snipe-It, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-09-08.
- How severe is CVE-2026-86738?
- High severity. CVSS v3 base score is 8.7 out of 10.