Improper Resolution of Path Equivalence in GitLab_CVE-2026-5816

8 / 10

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.

Basic Information

ID CVE-2026-5816

Source GitLab

Published Apr 22, 2026 at 16:04

Affected Product

Vendor GitLab

Product GitLab

Version 18.10

Affected Versions GitLab GitLab 18.10
GitLab GitLab 18.11

CWE Classification

CWE-41

References

{
    "lastseen": "",
    "description": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.",
    "published": "2026-04-22T16:04:26.293Z",
    "modified": "2026-04-22T16:04:26.293Z",
    "type": "cve",
    "title": "Improper Resolution of Path Equivalence in GitLab",
    "source": "GitLab",
    "references": "https://hackerone.com/reports/3572231\nhttps://gitlab.com/gitlab-org/gitlab/-/work_items/592816\nhttps://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/",
    "id": "CVE-2026-5816",
    "bulletinFamily": "",
    "cwe": [
        "CWE-41"
    ],
    "cvelist": null,
    "sourceData": "GitLab GitLab 18.10\nGitLab GitLab 18.11",
    "sourceHref": "",
    "cvss": {
        "score": 8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "GitLab",
    "version": "18.10",
    "vendor": "GitLab",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}