Is CVE-2026-35056 actively exploited?

CVE-2026-35056 has no public evidence of in-the-wild exploitation as of 2026-04-01.

What is the CVSS score for CVE-2026-35056?

CVE-2026-35056 has a CVSS score of 8.6 (HIGH severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2026-35056?

Patch guidance is available from xenforo security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-35056.

Which products are affected by CVE-2026-35056?

2 products: xenforo xenforo, xenforo xenforo.

Fix CVE-2026-35056 - HIGH xenforo xenforo

Description

XenForo before 2.3.9 and before 2.2.18 allows remote code execution (RCE) by authenticated, but malicious, admin users. An attacker with admin panel access can execute arbitrary code on the server.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: high
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-94 · Code Injection

Metadata

Primary Vendor: XENFORO
Published: 4/1/2026
Last Modified: 4/1/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-35056

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary