OPNsense: Direct comma-separated user privileges bypass OPNsense MVC read-only write protection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-71490
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-15 16:18:19 UTC
Updated2026-10-15 21:08:49 UTC
DescriptionOPNsense 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

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

Problem Types: CWE-863 | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Opnsense Core affected < 26.1.11 Not specified

References

ReferenceSourceLinkTags
github.com/opnsense/core/commit/578e025111161ffd03fd3fd0ccdac203be546505 [email protected] github.com
github.com/opnsense/core/security/advisories/GHSA-p9pr-782r-w2xw 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/opnsense/core/commit/f674f4ff294a3f7c4cd0591563f6df47bea50034 [email protected] github.com
github.com/opnsense/core/commit/e15a884973746319e79bd2cd421e8a015cc3ddb9 [email protected] github.com
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