CVE-2026-23695: Cockpit CMS Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-ch4j-vcf5-58x5
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2026-23695 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Cockpit CMS libraries in the Packagist ecosystem. The issue involves stored cross-site scripting vulnerability in the set field type's display template option. Remediation is available in the latest vendor maintenance releases.

CVE-2026-23695 at a Glance

CVE Identifier CVE-2026-23695
GHSA Identifier GHSA-ch4j-vcf5-58x5
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Cockpit CMS
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-23695

To remediate this vulnerability, upgrade all affected Cockpit CMS dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

cockpit-hq/cockpit fixed: Latest secure release 
Upgrade cockpit-hq/cockpit to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for cockpit-hq/cockpit

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-23695, inspect your project dependencies for Cockpit CMS:

inspect dependencies for cockpit-hq/cockpit

Analyze the terminal output to locate any version of Cockpit CMS in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Cockpit CMS, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Cockpit CMS through version 2.14.0, patched in commit 72a83fc, contains a stored cross-site scripting vulnerability in the Set field type's Display template option, where the template string is processed by the $interpolate function using new Function() and rendered via Vue's v-html directive without sanitization. An attacker with content/:models/manage permission can inject arbitrary JavaScript into the Display template, which executes in the browser of any user viewing the collection items list.

CVE-2026-23695 Affected Cockpit CMS Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
cockpit-hq/cockpit
 Packagist
≤ 2.14.0

References

NVD — CVE-2026-23695 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23695
Security Fix Commit FIX COMMIT
https://github.com/Cockpit-HQ/Cockpit/commit/72a83fcfe85ad8330e9ae834bc02fa517b5749e9
Cockpit CMS Source Repository REPOSITORY
https://github.com/Cockpit-HQ/Cockpit
www.vulncheck.com/advisories/cockpit-... WEB
https://www.vulncheck.com/advisories/cockpit-cms-stored-xss-via-set-field-display-template

Frequently Asked Questions

What is CVE-2026-23695?
CVE-2026-23695 is a security vulnerability in Cockpit CMS involving Stored cross-site scripting vulnerability in the Set field type's Display template option under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Cockpit CMS versions are affected?
Affected versions include releases prior to current release patches across affected packages: cockpit-hq/cockpit.
What version fixes CVE-2026-23695?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is cockpit-hq/cockpit affected?
Yes, cockpit-hq/cockpit is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-23695?
CVE-2026-23695 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-23695?
CVE-2026-23695 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2026-23695?
Run the dependency tree command: 'inspect dependencies for cockpit-hq/cockpit'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-ch4j-vcf5-58x5",
  "modified" : "2026-05-21T20:26:48Z",
  "published" : "2026-05-15T18:30:34Z",
  "aliases" : [ "CVE-2026-23695" ],
  "summary" : "Cockpit CMS: Stored cross-site scripting vulnerability in the Set field type's Display template option",
  "details" : "Cockpit CMS through version 2.14.0, patched in commit 72a83fc, contains a stored cross-site scripting vulnerability in the Set field type's Display template option, where the template string is processed by the $interpolate function using new Function() and rendered via Vue's v-html directive without sanitization. An attacker with content/:models/manage permission can inject arbitrary JavaScript into the Display template, which executes in the browser of any user viewing the collection items list.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "cockpit-hq/cockpit"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.14.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-23695"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Cockpit-HQ/Cockpit/commit/72a83fcfe85ad8330e9ae834bc02fa517b5749e9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Cockpit-HQ/Cockpit"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/cockpit-cms-stored-xss-via-set-field-display-template"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-21T20:26:48Z",
    "nvd_published_at" : "2026-05-15T17:16:45Z"
  }
}