CVE-2023-3906

Improper Validation of Specified Type of Input in GitLab

LOW
3.5
CVSS Score
Published: September 29, 2023 at 06:02 AM UTC
Updated: June 17, 2026 at 06:15 AM UTC
1 product affected across 1 vendorGitLab

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Severity
LOW3.5
Exploit prediction
EPSS 0.6%
SSVC
PoC

Description

An input validation issue in the asset proxy in GitLab EE, affecting all versions from 12.3 prior to 16.2.8, 16.3 prior to 16.3.5, and 16.4 prior to 16.4.1, allowed an authenticated attacker to craft image urls which bypass the asset proxy.

Affected

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

12.3 ≤ v < 16.2.816.3 ≤ v < 16.3.516.3.0 ≤ v < 16.3.516.4 ≤ v < 16.4.112.316.316.416.4.0
Affected range stops below 16.2.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.3.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.4.1, 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:

References (2)

Technical DescriptionExploitPermissions RequiredBroken Link
https://hackerone.com/reports/2071411

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

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

CVSS

3.5LOWGitLab
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-1287NVD-CWE-Other

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