CVE-2026-71490OPNsense: Direct comma-separated user privileges bypass OPNsense MVC read-only write protection
Updated under an hour ago ()
Does this affect you?
It affects opnsense core. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.38%, higher than 30% of scored CVEs.
Do this next
Free account, 1 product
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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.38% (percentile 30)
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
opnsense core opnsense:core (from the name) | before 26.1.11 | CNA record |
References
- https://github.com/opnsense/core/security/advisories/GHSA-p9pr-782r-w2xwx-refsource-confirm
- https://github.com/opnsense/core/commit/578e025111161ffd03fd3fd0ccdac203be546505x-refsource-misc
- https://github.com/opnsense/core/commit/e15a884973746319e79bd2cd421e8a015cc3ddb9x-refsource-misc
- https://github.com/opnsense/core/commit/f674f4ff294a3f7c4cd0591563f6df47bea50034x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.