LDAP Injection in Opnsense Core
CVE-2026-34578
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.6, OPNsense's LDAP authentication connector passes the login username directly into an LDAP search filter without calling ldap_escape(). An unauthenticated attacker c…
EPSS: 0.004 (33.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Opnsense Core — versions < 26.1.6
- Opnsense
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-34578?
- CVE-2026-34578 is a high-severity vulnerability in Opnsense Core, classified under LDAP Injection. CVSS score: 8.2/10. Published 2026-04-09.
- How severe is CVE-2026-34578?
- High severity. CVSS v3 base score is 8.2 out of 10.