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CVE-2026-3855

Improper Control of Resource Identifiers ('Resource Injection') in GitLab

MEDIUM
6.8
CVSS Score
Published: September 16, 2026 at 06:34 AM UTC
Updated: September 28, 2026 at 01:27 PM UTC
1 product affected across 1 vendorGitLab

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

GitLab· GitLabmaven
95%
18.2.7 ≤ v < 19.1.819.2 ≤ v < 19.2.619.2.0 ≤ v < 19.2.619.3 ≤ v < 19.3.219.3.0 ≤ v < 19.3.218.2.719.219.3
Affected range stops below 19.1.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 19.2.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 19.3.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Broken Link
Source: cverecord
https://gitlab.com/gitlab-org/gitlab/-/work_items/592821
Technical DescriptionExploitPermissions Required
Source: cverecord
https://hackerone.com/reports/3575167
Release NotesVendor Advisory
Source: cverecord
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-2-released/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-99

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