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CVE-2026-71490— OPNsense: Direct comma-separated user privileges bypass OPNsense MVC read-only write protection

Quick assessment

Affected
opnsense core
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.

OPNsense 是一个基于 FreeBSD 的防火墙和路由平台。在 26.1.11 版本之前，OPNsense\Core\ACL::hasPrivilege() 方法会将对直接分配、以逗号分隔的 值拼接为一个字符串，然后在检查 user-config-readonly（用户配置只读）权限时进行精确匹配。因此，如果某个用户被直接分配了某组件的写权限以及 user-config-readonly 权限，系统可能错误地认为该用户不具有只读限制，从而导致可通过 MVC API（由 throwReadOnly() 保护的接

CVSS 7.1 · High EPSS 0.38% · P30

Affected Version Matrix 1

VendorProduct Version RangeStatus
opnsense core < 26.1.11 affected
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I. Basic Information for CVE-2026-71490

Vulnerability Information
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Vulnerability Title
OPNsense: Direct comma-separated user privileges bypass OPNsense MVC read-only write protection
Source: CVE Program / CVE List V5
Vulnerability Description
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.11, OPNsense\Core\ACL::hasPrivilege() appends a directly assigned comma-separated <priv> value as one string and then uses an exact comparison when checking user-config-readonly. A user directly assigned both a component write privilege and user-config-readonly can therefore be treated as lacking the read-only restriction, and MVC APIs protected by throwReadOnly() can persist configuration changes for that component. Group privileges are not affected by the same parser flaw because the group path already splits comma-separated values. This issue is fixed in version 26.1.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
opnsense core < 26.1.11 -

II. Public POCs for CVE-2026-71490

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III. Intelligence Information for CVE-2026-71490

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Patches & Fixes for CVE-2026-71490 (3)

Vendor Advisories for CVE-2026-71490 (1)

Same Patch Batch · opnsense · 2026-10-15 · 10 CVEs total

CVE-2026-57155 9.9 CRITICAL OPNsense: Root RCE via Arbitrary File Write in GeoIP Alias Importer
CVE-2026-63442 8.1 HIGH OPNsense: Log Forgery via Login Username CRLF in WebGUI Authentication → Pf Table IP Block
CVE-2026-58390 8.0 HIGH OPNsense: Stored XSS to root RCE via OpenVPN client common_name in status views
CVE-2026-53582 7.1 HIGH OPNsense: XPATH Injection can disclose any secret in config.xml
CVE-2026-58393 5.9 MEDIUM OPNsense: OpenVPN Client Specific Override common_name allows path traversal in generated
CVE-2026-58391 5.4 MEDIUM OPNsense: Stored XSS in Firewall Rules/NAT pages via a HTML-attribute breakout
CVE-2026-58392 5.4 MEDIUM OPNsense: Stored XSS in Services: NTP GPS
CVE-2026-58394 5.2 MEDIUM OPNsense: Stored XSS in Administration Settings via Certificate Description
CVE-2026-58395 4.3 MEDIUM OPNsense: XPath injection in MVC safe-delete

IV. Related Vulnerabilities

Same product: core
Same vendor: opnsense
Same weakness: CWE-863

V. Comments for CVE-2026-71490

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