CVE-2026-86738

9.3 criticalEPSS 0.5%

Critical (9.3) in snipeitapp snipe-it. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

9.3 critical

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

CVSS 3.1

8.7 high

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-09-08
Modified: 2026-09-09
Record from: the NVD, synced 2026-10-19

Affected

snipeitapp:snipe-it

References

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

Check your stack JSON