Authentication Bypass Using an Alternate Path or Channel in GitLab

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-3035
StatePUBLISHED
AssignerGitLab
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-26 14:17:10 UTC
Updated2026-08-31 15:42:23 UTC
DescriptionGitLab has remediated an issue in GitLab EE affecting all versions from 11.3 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user with project Maintainer permissions could have accessed the terminal of a protected environment they were not authorized to use due to improper authorization checks.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.002390000 probability, percentile 0.147910000 (date 2026-08-30)

Problem Types: CWE-288 | CWE-288 CWE-288: Authentication Bypass Using an Alternate Path or Channel

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
3.1CNACVSS5.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gitlab Gitlab All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA GitLab GitLab affected 11.3 19.1.7 semver Not specified
CNA GitLab GitLab affected 19.2 19.2.5 semver Not specified
CNA GitLab GitLab affected 19.3 19.3.1 semver Not specified

References

ReferenceSourceLinkTags
gitlab.com/gitlab-org/gitlab/-/work_items/591189 [email protected] gitlab.com Issue Tracking, Vendor Advisory
hackerone.com/reports/3529751 [email protected] hackerone.com Permissions Required, Third Party Advisory
docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released [email protected] docs.gitlab.com Release Notes, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Thanks [go7f0](https://hackerone.com/go7f0) for reporting this vulnerability through our HackerOne bug bounty program (en)

Additional Advisory Data

Solutions

CNA: Upgrade to versions 19.1.7, 19.2.5, 19.3.1 or above.

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