CVE-2026-71490
OPNsense: Direct comma-separated user privileges bypass OPNsense MVC read-only write protection
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 15, 2026
- Updated
- Oct 15, 2026
- Reserved
- Aug 6, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.1 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L | GitHub_M |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
coreopnsense |
|
References
- https://github.com/opnsense/core/security/advisories/GHSA-p9pr-782r-w2xw
- https://github.com/opnsense/core/commit/578e025111161ffd03fd3fd0ccdac203be546505
- https://github.com/opnsense/core/commit/e15a884973746319e79bd2cd421e8a015cc3ddb9
- https://github.com/opnsense/core/commit/f674f4ff294a3f7c4cd0591563f6df47bea50034
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.