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CVE-2026-86738— Snipe-IT before 8.7.0 CSS Injection via Custom CSS

Quick assessment

Affected
grokability snipe-it
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Snipe-IT 8.7.0 之前的版本在“自定义 CSS”字段中存在 CSS 注入漏洞。这是由于对大于号（>）和双引号（"）的 HTML 编码进行了反向处理，导致净化（sanitization）不完整。超级用户可以通过使用 @import 和 url() 引用的恶意 CSS 载荷，利用属性选择器规则从其他超级用户处窃取 CSRF token，从而实现账户接管。

CVSS 8.7 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
grokability snipe-it < 8.7.0 affected
8.7.0 unaffected
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I. Basic Information for CVE-2026-86738

Vulnerability Information
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Vulnerability Title
Snipe-IT before 8.7.0 CSS Injection via Custom CSS
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
grokability snipe-it 0 ~ 8.7.0 -

II. Public POCs for CVE-2026-86738

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-86738

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Patches & Fixes for CVE-2026-86738 (1)

Vendor Advisories for CVE-2026-86738 (2)

Same Patch Batch · grokability · 2026-09-08 · 6 CVEs total

CVE-2026-86733 7.2 HIGH Snipe-IT before 8.7.0 Remote Code Execution via Backup Restore
CVE-2026-86734 6.5 MEDIUM Snipe-IT before 8.7.1 Denial of Service via Unbounded Note Field
CVE-2026-86735 5.0 MEDIUM snipe-it before 8.7.0 SSRF via IPv6 transition address bypass
CVE-2026-86736 4.3 MEDIUM snipe-it before 8.7.0 Checkout Request Counter Integrity Failure
CVE-2026-86737 4.3 MEDIUM snipe-it before 8.7.0 Missing Authorization via barcode endpoint

IV. Related Vulnerabilities

Same product: snipe-it
Same vendor: grokability
Same weakness: CWE-79

V. Comments for CVE-2026-86738

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