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GitLab CE/EE EUVD-2026-36232

| CVE-2026-3553 LOW
Incorrect Authorization (CWE-863)
2026-06-11 GitLab GHSA-h8wc-8hmg-pcc9
3.1
CVSS 3.1 · Vendor: GitLab

Severity by source

Vendor (GitLab) PRIMARY
3.1 LOW
AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
3.1 LOW

Network-reachable flaw requiring low-privilege auth and specific undisclosed conditions; only confidential issue text is exposed with no integrity or availability impact.

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (GitLab).

CVSS VectorVendor: GitLab

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Jun 11, 2026 - 13:01 EUVD
Analysis Generated
Jun 11, 2026 - 11:58 vuln.today

DescriptionCVE.org

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.0 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user to access confidential issue details due to incorrect authorization checks.

AnalysisAI

Incorrect authorization checks in GitLab CE/EE expose confidential issue details to authenticated low-privileged users under specific conditions. The flaw spans an enormous version range starting from 12.0, meaning a large population of self-hosted GitLab instances running unpatched versions is potentially affected. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate to GitLab instance with low-privilege account
Delivery
Identify project containing confidential issues
Exploit
Satisfy specific triggering conditions (AC:H)
Execution
Submit crafted request bypassing authorization check
Impact
Read confidential issue title and body

Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated GitLab session with at minimum low-privilege access to the target instance (consistent with CVSS PR:L). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 3.1 (Low) reflects limited scope: network-accessible (AV:N), high complexity (AC:H), low-privilege authentication required (PR:L), no user interaction needed (UI:N), unchanged scope (S:U), and only limited confidentiality impact (C:L) with no integrity or availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated GitLab user with Guest-level or other low-privileged access to a project navigates to or queries a confidential issue, triggering the flawed authorization code path under the specific conditions required by AC:H. The publicly available HackerOne report (#3578216) documents the technique, allowing a malicious project member to read sensitive business, security, or development context that project owners intended to keep restricted.
Remediation Vendor-released patches are available: upgrade to GitLab 18.10.8, 18.11.5, or 19.0.2 depending on your current release stream. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-36232 vulnerability details – vuln.today

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