CVE-2026-86738

Snipe-IT before 8.7.0 CSS Injection via Custom CSS

At a glance

Severity: CRITICAL 9.3
EPSS: EPSS 0.49 % · percentile 42 (2026-10-27)
State: PUBLISHED
Published: 2026-09-08
Updated: 2026-09-08
Assigner: VulnCheck
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	CRITICAL 9.3	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	VulnCheck
CVSS 3.1	HIGH 8.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N	VulnCheck
CVSS 4.0	CRITICAL 9.3	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:X/V:X/RE:X/U:X	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	HIGH 8.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N	NVD · disclosure@vulncheck.com (Primary)

Weaknesses (CWE)

CWE-79

European references

ENISA EUVD · EUVD-2026-72874
GCVE · GCVE-0-2026-86738

Affected configurations (NVD CPE)

cpe:2.3:a:snipeitapp:snipe-it:*:*:*:*:*:*:*:* ≥ 3.0.0 < 8.7.0

Affected products

Product	Versions
grokability · snipe-it	affected 0 < 8.7.0 ; unaffected 8.7.0

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD