OPNsense up to 26.1.10 Safe-Delete config.xml delBase xpath injection

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k1.33+

Summaryinfo

A vulnerability labeled as problematic has been found in OPNsense up to 26.1.10. This impacts the function ApiMutableModelControllerBase::delBase of the file config.xml of the component Safe-Delete. Executing a manipulation can lead to xpath injection. This vulnerability is tracked as CVE-2026-58395. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in OPNsense up to 26.1.10 and classified as problematic. This vulnerability affects the function ApiMutableModelControllerBase::delBase of the file config.xml of the component Safe-Delete. The manipulation with an unknown input leads to a xpath injection vulnerability. The CWE definition for the vulnerability is CWE-643. The product uses external input to dynamically construct an XPath expression used to retrieve data from an XML database, but it does not neutralize or incorrectly neutralizes that input. This allows an attacker to control the structure of the query. As an impact it is known to affect confidentiality. CVE summarizes:

OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the safe-delete path reached through ApiMutableModelControllerBase::delBase() interpolates an unvalidated safe-delete token from the request URL into an XPath expression over config.xml before confirming that the token is a valid identifier. A user holding any one affected module privilege can send a crafted token to one of 21 affected delete endpoints covering Traffic Shaper, DHCP relay, Dnsmasq, Firewall Category, or Kea DHCP, causing the XPath to match configuration data across modules. The resulting error response exposes configuration item names, descriptions, reference paths, and UUIDs and provides an XPath substring-presence oracle, including for modules the user cannot otherwise access. The request does not modify configuration or perform a deletion. This issue is fixed in version 26.1.11.

The advisory is available at github.com. This vulnerability was named CVE-2026-58395 since 06/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1055 by the MITRE ATT&CK project.

By approaching the search of inurl:config.xml it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 26.1.11 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Xpath injection
CWE: CWE-643 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OPNsense 26.1.11

Timelineinfo

06/30/2026 CVE reserved
10/15/2026 +107 days Advisory disclosed
10/15/2026 +0 days VulDB entry created
10/15/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-58395 (🔒)
GCVE (CVE): GCVE-0-2026-58395
GCVE (VulDB): GCVE-100-420682

Entryinfo

Created: 10/15/2026 17:34
Changes: 10/15/2026 17:34 (65)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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