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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 can inject LDAP filter metacharacters into the username field of the WebGUI login page to enumerate valid LDAP usernames in the configured directory. When the LDAP server configuration includes an Extended Query to restrict login to members of a specific group,
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b9af7349c17d4fe222a8d08c56fab7c02e0c92963ccfcebfeb4cb241d6c3e9d9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"core","vendor":"opnsense","versions":[{"status":"affected","version":"< 26.1.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d633e72fb6eaef092e055a0170e441b35b779e1713bddb25e79c45e0cf65e01e · sha256:2e07311b4c8006ff… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d633e72fb6eaef092e055a0170e441b35b779e1713bddb25e79c45e0cf65e01e · sha256:2e07311b4c8006ff… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-90","description":"CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d633e72fb6eaef092e055a0170e441b35b779e1713bddb25e79c45e0cf65e01e · sha256:2e07311b4c8006ff… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/opnsense/core/commit/016f66cb4620cd48183fa97843f343bb71813c6e","tags":["x_refsource_MISC"],"url":"https://github.com/opnsense/core/commit/016f66cb4620cd48183fa97843f343bb71813c6e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d633e72fb6eaef092e055a0170e441b35b779e1713bddb25e79c45e0cf65e01e · sha256:2e07311b4c8006ff… · /containers/cna/references/1
{"name":"https://github.com/opnsense/core/security/advisories/GHSA-jpm7-f59c-mp54","tags":["x_refsource_CONFIRM"],"url":"https://github.com/opnsense/core/security/advisories/GHSA-jpm7-f59c-mp54"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d633e72fb6eaef092e055a0170e441b35b779e1713bddb25e79c45e0cf65e01e · sha256:2e07311b4c8006ff… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/opnsense/core/security/advisories/GHSA-jpm7-f59c-mp54"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d633e72fb6eaef092e055a0170e441b35b779e1713bddb25e79c45e0cf65e01e · sha256:2e07311b4c8006ff… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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