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CVE-2026-12436— Improperly Controlled Modification of Dynamically-Determined Object Attributes 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是美国GitLab公司开源的一款源代码管理平台。 GitLab CE/EE 19.0.5版本之前的18.0版本、19.1.3版本之前的19.1版本和19.2.1版本之前的19.2版本存在输入验证错误漏洞，该漏洞源于对用户提供的属性验证不当，处理管道计划输入时，可能导致认证用户修改其他用户的CI/CD配置。

CVSS 8.4 · High EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 18.0< 19.0.5 affected
19.1< 19.1.3 affected
19.2< 19.2.1 affected
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I. Basic Information for CVE-2026-12436

Vulnerability Information
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Vulnerability Title
Improperly Controlled Modification of Dynamically-Determined Object Attributes in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an authenticated user to modify CI/CD configuration belonging to another user due to improper validation of user-supplied attributes when processing pipeline schedule inputs.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-915
Source: CVE Program / CVE List V5
Vulnerability Title
GitLab 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitLab是美国GitLab公司开源的一款源代码管理平台。 GitLab CE/EE 19.0.5版本之前的18.0版本、19.1.3版本之前的19.1版本和19.2.1版本之前的19.2版本存在输入验证错误漏洞，该漏洞源于对用户提供的属性验证不当，处理管道计划输入时，可能导致认证用户修改其他用户的CI/CD配置。
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 18.0 ~ 19.0.5 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-12436

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III. Intelligence Information for CVE-2026-12436

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Patches & Fixes for CVE-2026-12436 (1)

Other References for CVE-2026-12436 (1)

Same Patch Batch · GitLab · 2026-07-29 · 13 CVEs total

CVE-2026-6267 8.5 HIGH Insertion of Sensitive Information Into Sent Data in GitLab
CVE-2026-15975 7.5 HIGH Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-13113 6.5 MEDIUM Time-of-check Time-of-use (TOCTOU) Race Condition in GitLab
CVE-2026-16553 5.4 MEDIUM Insufficiently Protected Credentials in GitLab
CVE-2026-6336 5.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-14341 4.9 MEDIUM Missing Authorization in GitLab
CVE-2026-3093 4.7 MEDIUM Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-15831 4.3 MEDIUM Generation of Incorrect Security Tokens in GitLab
CVE-2026-15077 4.3 MEDIUM Improper Neutralization of Input Used for LLM Prompting in GitLab
CVE-2026-14351 4.3 MEDIUM Exposure of Sensitive Information Through Metadata in GitLab
CVE-2026-4672 4.3 MEDIUM Missing Authorization in GitLab
CVE-2025-14562 3.1 LOW Incorrect Authorization in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-915

V. Comments for CVE-2026-12436

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