CVE-2026-1184
📛 CVE Title
Deserialization of Untrusted Data in GitLab
Description
GitLab has remediated an issue in GitLab EE affecting all versions from 11.9 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by uploading a specially crafted file due to improper validation.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- GitLab
- CVSS severity
- MEDIUM
- CVSS score
- 6.5 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- Effective score
- 6.5 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-502 - Reserved
- 2026-01-19
- Published
- 2026-05-14 05:37 UTC
- Last updated
- 2026-05-14 13:04 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/1xxx/CVE-2026-1184.json
- Linked Threat
- CVE-2026-1184 — CVE-2026-1184
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-14 06:16:21 UTC
- NVD last modified
- 2026-05-16 03:37:47 UTC
- NVD CVSS v3.1
- 6.5 / 10 MEDIUM source: cve@gitlab.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- Exploitability subscore
- 2.8 / 10
- Impact subscore
- 3.6 / 10
- EPSS score
- 0.0002 (probability of exploitation in next 30 days)
- EPSS percentile
- 4.08% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 04:43 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-30219 - Assigner
- GitLab
- Published
- May 14, 2026, 5:37:02 AM
- Updated
- May 14, 2026, 1:04:20 PM
- EUVD base score (CVSS 3.1)
-
6.5 / 10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EUVD-reported EPSS
- 0.0200
- Vendors
- GitLab
- Products
-
GitLab (11.9 <18.9.7)GitLab (18.11 <18.11.3)GitLab (18.10 <18.10.6)
ENISA description: GitLab has remediated an issue in GitLab EE affecting all versions from 11.9 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by uploading a specially crafted file due to improper validation.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| GitLab | GitLab |
11.9 (affected),
18.10 (affected),
18.11 (affected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
Vendor references (3)
References embedded in the original CVE record by the assigning CNA.
- HackerOne Bug Bounty Report #3515842 technical-descriptionexploitpermissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/586634
- https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
Web references (9)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://attackerkb.com/topics/CVE-2026-1184 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30219 rapid7:euvd.enisa.europa.eu
- http://cwe.mitre.org/data/definitions/502.html rapid7:cwe.mitre.org
- https://hackerone.com/reports/3515842 tenable:hackerone.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-1184 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-1184 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
- https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/ tenable:about.gitlab.com
- https://gitlab.com/gitlab-org/gitlab/-/work_items/586634 tenable:gitlab.com
NVD-tagged references (3)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/ cve@gitlab.com Release Notes
- https://gitlab.com/gitlab-org/gitlab/-/work_items/586634 cve@gitlab.com Not Applicable
- https://hackerone.com/reports/3515842 cve@gitlab.com Permissions Required
Remediations (17)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:app.opencve.io
This vulnerability arises from deserialization of untrusted data that allows an unauthenticated user to upload a specially crafted file causing a denial of service in GitLab Enterprise Edition. The flaw stems from inadequate validation of uploaded content, which can exhaust resources or corrupt the state of the application, ultimately interrupting availability. The weakness is classified under ...
2026-05-23 21:36 UTC -
web:blog.talosintelligence.com
Microsoft has released its monthly security update for May 2026 , which includes 137 vulnerabilities affecting a range of products, including 16 that Microsoft marked as "critical".
2026-05-23 21:36 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-23 21:36 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
2026-05-23 21:36 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's January 2026 Patch Tuesday with security updates for 114 flaws, including one actively exploited and two publicly disclosed zero-day vulnerabilities.
2026-05-23 21:36 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-23 21:36 UTC -
web:www.forbes.com
Microsoft has confirmed an emergency security update as CISA warns that two new Defender zero-days are being exploited by attackers.
2026-05-23 21:36 UTC -
web:www.microsoft.com
These Knowledge Base articles accompany all security updates and advisories, and include caveats or known issues with security updates. Additionally, support engineers document common concerns from customers in these KB articles. These Knowledge Base articles are published the Security Update Guide with each release on Patch Tuesday.
2026-05-23 21:36 UTC -
web:www.pcworld.com
This month's Patch Tuesday brings over 80 fixes for various security vulnerabilities. Fortunately, none are actively being exploited in the wild yet.
2026-05-23 21:36 UTC -
web:www.pcworld.com
This month's Patch Tuesday includes an actively exploited Office zero-day vulnerability and several critical RCE bugs in Windows and Remote Desktop.
2026-05-23 21:36 UTC -
web:4sysops.com
Starting in April 2026 , Windows updates will change the default Kerberos ticket issuance behavior to AES-SHA1 for accounts without explicit encryption settings, while RC4 can still be used where explicitly enabled. This change, driven by CVE - 2026 -20833, affects every Windows Server environment where service accounts or devices still rely on RC4. Any service account, NAS device, or legacy ...
2026-05-26 02:54 UTC -
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-26 02:54 UTC -
web:nvd.nist.gov
This is a potential security issue, you are being redirected to https://nvd.nist.gov
2026-05-26 02:54 UTC -
web:www.msn.com
Microsoft suggests the threat is being used in phishing attacks against vulnerable systems since successful exploitation requires local access to the PC.
2026-05-26 02:54 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-26 02:54 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-26 02:54 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-26 02:54 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-1184.json.
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