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CVE-2023-6159

Inefficient Regular Expression Complexity in GitLab

MEDIUM
6.5
CVSS Score
Published: January 26, 2024 at 02:02 AM UTC
Updated: June 17, 2026 at 06:50 AM UTC
1 product affected across 1 vendorGitLab

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

Description

An issue has been discovered in GitLab CE/EE affecting all versions from 12.7 prior to 16.6.6, 16.7 prior to 16.7.4, and 16.8 prior to 16.8.1 It was possible for an attacker to trigger a Regular Expression Denial of Service via a `Cargo.toml` containing maliciously crafted input.

Affected

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

GitLab· GitLabmaven
95%
12.7 ≤ v < 16.6.612.7.0 ≤ v < 16.6.616.7 ≤ v < 16.7.416.7.0 ≤ v < 16.7.416.8 ≤ v < 16.8.112.716.716.816.8.0
Affected range stops below 16.6.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.7.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.8.1, 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:

Patch and advisory references

References (3)

Vendor Advisory
Source: [email protected]
https://about.gitlab.com/releases/2024/01/25/critical-security-release-gitlab-16-8-1-released/
Issue TrackingPermissions RequiredBroken Link
Source: [email protected]
https://gitlab.com/gitlab-org/gitlab/-/issues/431924
Technical DescriptionExploitPermissions RequiredBroken Link
Source: [email protected]
https://hackerone.com/reports/2251278

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

6.5MEDIUMGitLab
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1333

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