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CVE-2026-3855— Improper Control of Resource Identifiers ('Resource Injection') in GitLab

Quick assessment

Affected
GitLab GitLab
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2.7 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an authenticated user with project-level permissions to access restrict

CVSS 3.1 · Low
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I. Basic Information for CVE-2026-3855

Vulnerability Information

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Vulnerability Title
Improper Control of Resource Identifiers ('Resource Injection') in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2.7 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an authenticated user with project-level permissions to access restricted file contents on the server or cause denial of service due to improper validation of parameters in the Terraform state upload functionality.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对资源描述符的控制不恰当(资源注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab 18.2.7 ~ 19.1.8 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-3855

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-3855

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Patches & Fixes for CVE-2026-3855 (1)

Other References for CVE-2026-3855 (1)

Same Patch Batch · GitLab · 2026-09-16 · 11 CVEs total

CVE-2026-79708 8.5 HIGH Incorrect Authorization in GitLab
CVE-2026-78252 8.2 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2025-14871 7.5 HIGH Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-1168 7.5 HIGH Allocation of Resources Without Limits or Throttling in GitLab
CVE-2024-11222 6.4 MEDIUM Time-of-check Time-of-use (TOCTOU) Race Condition in GitLab
CVE-2026-19619 4.7 MEDIUM Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-86341 4.4 MEDIUM Access Control Check Implemented After Asset is Accessed in GitLab
CVE-2026-7514 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-8030 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-16794 4.3 MEDIUM Missing Authorization in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-99

V. Comments for CVE-2026-3855

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