EUVD-2026-66427
GHSA-6mxv-c89j-2494
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Network-accessible exploitation requiring only low-privilege authentication (PR:L, AV:N); impact is availability-only on background processing with no confidentiality or integrity loss.
Primary rating from Vendor (GitLab).
CVSS VectorVendor: GitLab
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionCVE.org
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.8 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, could have allowed an authenticated user to cause a denial of service affecting background job processing, due to missing object count limits.
AnalysisAI
GitLab CE/EE allows any authenticated user to cause denial of service against background job processing due to missing object count limits, affecting all versions from 12.8 through pre-19.3.1. The CVSS vector (PR:L, AV:N, A:H) confirms low-privilege network-accessible exploitation with full availability impact on Sidekiq-backed async processing, including CI/CD pipelines and repository operations. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated GitLab user account; the CVSS vector PR:L confirms that low-privilege access (e.g., a standard Developer or Guest role member) is sufficient - unauthenticated access is not enough. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.5 Medium rating with AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H accurately captures the realistic threat: network-reachable with low complexity, but gated behind authentication (PR:L), with purely availability-class impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated GitLab user - including a low-privilege member with no special roles - submits crafted requests that exploit the absence of object count limits, enqueuing a large volume of background jobs without server-side throttling. As Sidekiq workers drain the inflated queue, legitimate asynchronous workloads such as CI/CD pipeline jobs, repository mirror syncs, and webhook deliveries experience degraded throughput or complete starvation. … |
| Remediation | Upgrade to GitLab CE/EE 19.1.7, 19.2.5, or 19.3.1 as documented in the official patch release advisory at https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Denial Of Service
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External POC / Exploit Code
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