CVE-2026-5262

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Source
https://cve.org/CVERecord?id=CVE-2026-5262
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5262.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-5262
Aliases
Published
2026-04-22T16:04:36.550Z
Modified
2026-08-23T03:42:23.278138055Z
Severity
  • 8.0 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N CVSS Calculator
Summary
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Details

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.1.0 before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1 that under certain conditions could have allowed an unauthenticated user to access tokens in the Storybook development environment due to improper input validation.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "16.1.0"
                },
                {
                    "fixed": "18.9.6"
                },
                {
                    "introduced": "18.10"
                },
                {
                    "fixed": "18.10.4"
                },
                {
                    "introduced": "18.11"
                },
                {
                    "fixed": "18.11.1"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "16.1.0"
                },
                {
                    "fixed": "18.9.6"
                },
                {
                    "introduced": "18.10"
                },
                {
                    "fixed": "18.10.4"
                },
                {
                    "introduced": "18.11"
                },
                {
                    "fixed": "18.11.1"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-79"
    ],
    "cna_assigner": "GitLab",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5262.json"
}
References

Affected packages

Git / gitlab.com/gitlab-org/gitlab

Affected ranges

Type
GIT
Repo
https://gitlab.com/gitlab-org/gitlab
Events
Introduced
4961ad113f3afe23965ac12285eaab31315ab0c6
Fixed
48d537ce479485ffb6aef70f62ead88ac15e78b8
Introduced
57c08314af5bc8f317b1967330f92ed029e2c628
Fixed
2c4a87e00b3f5ab1eab353136020dfcab34ae6ca
Introduced
1060c7b0ff78be7c8abe8fd6d23dcb1ca493fd78
Last affected
1060c7b0ff78be7c8abe8fd6d23dcb1ca493fd78
Database specific
Show details 
{
    "source": [
        "CPE_RANGE",
        "CPE_STRING"
    ],
    "extracted_events": [
        {
            "introduced": "16.1.0"
        },
        {
            "fixed": "18.9.6"
        },
        {
            "introduced": "18.10.0"
        },
        {
            "fixed": "18.10.4"
        },
        {
            "introduced": "18.11.0"
        },
        {
            "last_affected": "18.11.0"
        }
    ],
    "cpe": [
        "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
        "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
        "cpe:2.3:a:gitlab:gitlab:18.11.0:*:*:*:community:*:*:*",
        "cpe:2.3:a:gitlab:gitlab:18.11.0:*:*:*:enterprise:*:*:*"
    ]
}

Affected versions

18.*
18.11.0
v18.*
v18.10.0-ee
v18.10.2-ee
v18.11.0-ee

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5262.json"