CVE-2026-58395Public exploitNetwork attack vector

Configuration disclosure via safe-delete XPath injection

Published Oct 15, 2026 · Updated Oct 15, 2026

XPath injection in OPNsense before 26.1.11 allows remote authenticated users to read configuration metadata via delete requests. ApiMutableModelControllerBase::delBase() passes unvalidated URL tokens into an XPath expression over config.xml, exposing cross-module names, descriptions, reference paths, and UUIDs through error responses and enabling substring-presence queries. Access requires one affected module privilege; these requests neither modify configuration nor delete items.

CVSS severity4.3
Medium
EPSS probability0.36%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XPath injection in OPNsense before 26.1.11 allows remote authenticated users to read configuration metadata via delete requests. ApiMutableModelControllerBase::delBase() passes unvalidated URL tokens into an XPath expression over config.xml, exposing cross-module names, descriptions, reference paths, and UUIDs through error responses and enabling substring-presence queries. Access requires one affected module privilege; these requests neither modify configuration nor delete items.

The record

CVE
CVE-2026-58395
Published
Oct 15, 2026
Updated
Oct 15, 2026
Vendor
OPNsense
Product
OPNsense
Classifications
CWE-643
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 26.1.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OPNsense · OPNsenseversion=< 26.1.11

Published CVSS scores

4.3OPNsenseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-643Improper Neutralization of Data within XPath Expressions ('XPath Injection')

Public exploit references

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Technologies

Your stack

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Your stack

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