EUVD-2026-80117
GHSA-q86m-h56q-9rjq
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Network-reachable content but human paste interaction (UI:R) and unreliable payload survival (AC:H) drive the low base score; no availability impact.
Primary rating from Vendor (GitLab).
CVSS VectorVendor: GitLab
Lifecycle Timeline
3DescriptionCVE.org
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.0 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an unauthenticated user to execute arbitrary JavaScript in the context of a targeted user's session due to improper sanitization of pasted HTML content in the Content Editor.
AnalysisAI
A stored/cross-context cross-site scripting flaw (CWE-79) in GitLab CE/EE's Content Editor allows an unauthenticated attacker to run arbitrary JavaScript in a targeted user's session, because pasted HTML is not sanitized properly. All GitLab Community and Enterprise Edition versions from 19.0 up to (but not including) 19.1.8, 19.2.6, and 19.3.2 are affected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires (1) a GitLab instance running an affected version in the 19.0-19.3 ranges listed, (2) the targeted user to actively paste attacker-influenced HTML into a Content Editor surface (issue, comment, wiki, or similar rich-text field) - this is the UI:R requirement and the core non-default-behavior condition, and (3) the malicious markup must survive the editor's paste handling long enough to be rendered, which the vulnerability description states it does due to improper sanitization. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Conflicting but ultimately moderate signals: the CVSS base is only 4.7 with AV:N yet AC:H, UI:R, and S:C - meaning exploitation requires the victim to actively paste attacker-supplied HTML, which sharply reduces reliable mass exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to a fixed release: GitLab 19.1.8, 19.2.6, or 19.3.2 (or later on each respective branch) - these are vendor-released patches per the patch release advisory at https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-2-released/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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