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Vulnerability record · CVE-2026-86738 · published 8 September 2026

CVE-2026-86738: Snipeitapp snipe-it cross-site scripting vulnerability

Snipeitapp · Snipe It

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.

9.3 CVSS 4.0 Critical EPSS 0.49% · top 60.5% CWE-79 · Cross-site scripting
9.3CVSS 4.0 base score
0.49%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
9 Sep 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/grokability/snipe-it/commit/d26d71688359707f3b257fc04fe6c3e5a17405f9 Patch
https://github.com/grokability/snipe-it/security/advisories/GHSA-pvcw-mp8q-mj39 PatchVendor Advisory
https://www.vulncheck.com/advisories/snipe-it-before-8.7.0-css-injection-via-custom-css PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-86738), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.