CVE-2026-71490
OPNsense: Direct comma-separated user privileges bypass OPNsense MVC read-only write protection
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| NVDNVD · Deferred | 3.1 | High7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
- EPSS (exploitation in 30 days)
- 0.38% · top 68% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Weakness
Affected products
References (4)
- https://github.com/opnsense/core/security/advisories/GHSA-p9pr-782r-w2xw (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/opnsense/core/commit/578e025111161ffd03fd3fd0ccdac203be546505 (opens in a new tab)x_refsource_MISC
- https://github.com/opnsense/core/commit/e15a884973746319e79bd2cd421e8a015cc3ddb9 (opens in a new tab)x_refsource_MISC
- https://github.com/opnsense/core/commit/f674f4ff294a3f7c4cd0591563f6df47bea50034 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-71490)Record last updated .