EUVD-2026-57396
GHSA-mrwr-f6g8-28q2
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The vendor-assigned AC:L conflicts with 'certain conditions' language and SSVC Automatable:no, so AC:H better reflects realistic exploitation complexity; no C or I impact applies.
Primary rating from Vendor (GitLab).
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
7DescriptionNVD
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed an unauthenticated user to cause a denial of service due to improper input validation.
AnalysisAI
Denial of service in GitLab CE/EE (versions 18.5 through pre-19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2) allows unauthenticated remote attackers to exhaust server resources through improper input validation, rooted in CWE-770 (resource allocation without throttling limits). Exploitation is conditional - the description explicitly qualifies 'under certain conditions' - which is reinforced by SSVC classifying the attack as non-automatable despite a CVSS PR:N/AC:L rating. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | GitLab's advisory explicitly states exploitation is possible only 'under certain conditions,' though the specific triggering configuration or feature is not disclosed in the public advisory at time of analysis - the full details are visible in the referenced HackerOne report (#3638799) and GitLab work item #598561, both of which may be access-controlled. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 High score with AV:N/AC:L/PR:N/UI:N suggests trivially exploitable, unauthenticated network-based denial of service - but multiple corroborating signals significantly temper this assessment. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker identifies a GitLab instance running a vulnerable version (18.5 through pre-19.0.6, 19.1 before 19.1.4, or 19.2 before 19.2.2) that meets the undisclosed 'certain conditions.' Using the publicly available proof-of-concept from HackerOne report #3638799, the attacker submits a specially crafted HTTP request to a vulnerable endpoint, triggering unbounded resource consumption. With repeated or concurrent requests, the GitLab application process exhausts available memory or CPU, degrading or completely denying service to legitimate developers and CI/CD pipelines dependent on the instance. |
| Remediation | Vendor-released patches are available: upgrade to GitLab 19.0.6, 19.1.4, or 19.2.2 depending on the currently deployed version stream. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all GitLab CE/EE instances and document versions running (affected versions: 18.5 through pre-19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2). …
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Same technique Denial Of Service
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External POC / Exploit Code
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