CVE-2026-3160— Unintended Proxy or Intermediary ('Confused Deputy') in GitLab

CVSS 5.8 · Medium EPSS 0.01% · P3 Updated May 15, 2026

Possible ATT&CK Techniques 1AI

Affected Version Matrix 3

Vendor	Product	Version Range	Status
GitLab	GitLab	`13.7< 18.9.7`	affected
		`18.10< 18.10.6`	affected
		`18.11< 18.11.3`	affected

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I. Basic Information for CVE-2026-3160

Vulnerability Information

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Vulnerability Title

Unintended Proxy or Intermediary ('Confused Deputy') in GitLab

Source: NVD (National Vulnerability Database)

Vulnerability Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.7 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user to view Jira issues outside the configured project scope due to an integration filter functioning only as a display control rather than enforcing access boundaries as specified.

Source: NVD (National Vulnerability Database)

CVSS Information

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

Source: NVD (National Vulnerability Database)

Vulnerability Type

未有动机的代理或中间人(混淆代理)

Source: NVD (National Vulnerability Database)

Vulnerability Title

GitLab 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

GitLab是美国GitLab公司的一个端到端软件开发平台，具有内置的版本控制、问题跟踪、代码审查、CI/CD（持续集成和持续交付）等功能。 GitLab CE/EE 13.7至18.9.7之前版本、18.10至18.10.6之前版本和18.11至18.11.3之前版本存在安全漏洞，该漏洞源于集成过滤器仅作为显示控制而非强制执行访问边界，可能导致认证用户查看指定项目范围之外的Jira问题。

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
GitLab	GitLab	13.7 ~ 18.9.7	`cpe:2.3:a:gitlab:gitlab::::::::`

II. Public POCs for CVE-2026-3160

#	POC Description	Source Link	Shenlong Link

AI-Generated POCPremium

No public POC found.

III. Intelligence Information for CVE-2026-3160

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https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/591354
https://hackerone.com/reports/3566042technical-descriptionexploitpermissions-required
https://nvd.nist.gov/vuln/detail/CVE-2026-3160

Same Patch Batch · GitLab · 2026-05-14 · 24 CVEs total

CVE-2026-7481	8.7 HIGH	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-7377	8.7 HIGH	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-6073	8.7 HIGH	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2025-14869	7.5 HIGH	Improper Validation of Specified Quantity in Input in GitLab
CVE-2025-14870	7.5 HIGH	Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-1659	7.5 HIGH	Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-1322	6.8 MEDIUM	Business Logic Errors in GitLab
CVE-2026-1184	6.5 MEDIUM	Deserialization of Untrusted Data in GitLab
CVE-2026-8280	6.5 MEDIUM	Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-4524	6.5 MEDIUM	Authentication Bypass Using an Alternate Path or Channel in GitLab
CVE-2026-4527	6.5 MEDIUM	Cross-Site Request Forgery (CSRF) in GitLab
CVE-2026-6335	5.4 MEDIUM	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2025-12669	5.4 MEDIUM	Improper Control of Generation of Code ('Code Injection') in GitLab
CVE-2026-3607	4.3 MEDIUM	Access Control Check Implemented After Asset is Accessed in GitLab
CVE-2026-8144	4.3 MEDIUM	Missing Authorization in GitLab
CVE-2026-6063	4.3 MEDIUM	Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-3074	4.3 MEDIUM	Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-3073	4.3 MEDIUM	Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-1338	4.3 MEDIUM	Authorization Bypass Through User-Controlled Key in GitLab
CVE-2025-13874	4.3 MEDIUM	Authorization Bypass Through User-Controlled Key in GitLab

Showing top 20 of 24 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: GitLab

Same vendor: GitLab

Same weakness: CWE-441

V. Comments for CVE-2026-3160

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CVE-2026-3160— Unintended Proxy or Intermediary ('Confused Deputy') in GitLab

Possible ATT&CK Techniques 1AI

Affected Version Matrix 3

I. Basic Information for CVE-2026-3160

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-3160

III. Intelligence Information for CVE-2026-3160

Same Patch Batch · GitLab · 2026-05-14 · 24 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-3160

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