AEGLIX investigation
CVE-2026-58391 research
A source-linked research view connecting vulnerability evidence, reviewed campaign mentions, retained reporting and security tool listings.
Evidence summary
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, Firewall Rules and NAT views place stored category names and alias descriptions into HTML title attributes in filter_rule.volt and nat_rule.volt without quote-safe encoding. The response layer uses ENT_NOQUOTES, so a double quote survives and closes the attribute, allowing an event-handler attribute to be added to the existing span. A user with Firewall Categories or Firewall Alias Edit privileges can store a category name or alias description; the category must be assigned to a filter or NAT rule, or the alias must be referenced by a rule source or destination, and the rule must be saved so the affected ...
Assess exposure and vendor guidance
- No higher-priority signal is available in the current stored evidence.
CVSS: 5.4 · EPSS: 0.27% (2026-10-28)
Source retrieved 2026-10-28T10:22:43.250780+00:00. Read the full record and affected versions before making a patch decision.
Campaign content mentioning this CVE
Only published campaigns that passed the existing source-review gate are included. A textual mention does not establish exploitation or campaign membership.
No exact mention was found in the checked published campaign content.
Stored reporting mentioning this CVE
These are publisher excerpts, not independent verification of their claims.
No exact mention was found in the checked stored news excerpts.
Investigate advisory publishers
These domains come from vulnerability references. They are advisory publishers, not identified threat indicators. Links prefill Investigate; you choose whether to run a lookup.
- github.com
- hackerask.com
Find referenced tools in Arsenal
Search published listings whose documented CVE-reference field contains CVE-2026-58391. An empty result is valid. A reference does not establish safety, exploit reliability or suitability for your environment.
Search exact CVE references in Arsenal
Review the listing’s source and trust evidence. Use testing tools only on systems you are authorized to assess.
Coverage and interpretation
Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence.
Checked up to 100 candidate excerpts and 100 candidate campaigns; at most 10 results per section are shown. No external search or scan ran while loading this page.