CVE-2026-847398.7HighCWE-79
CVE-2026-84739: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Vendor fix available · Affected: GitLab · Exploitation: not established
ExploitationNot established
Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)
- In CISA KEV: not seen
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public: not seen
- Not establishedNothing in the sources we check
0.3%probability of exploitation in the next 30 days
28th percentile
050100
Higher than 28% of scored CVEs
8.7HighCVSS 3.1
LowMediumHighCrit.
DescriptionNVD
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary JavaScript in the context of another user's browser session due to improper sanitization of path components in the merge request diff viewer.
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Weakness
- Cross-site Scripting
- Vendor
- GitLab
- Published
- September 2026
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 24 Sep.
- GitLab Fixes Critical CI/CD Flaws Enabling Arbitrary Code ExecutionSecurityOnline · first in our coverage · mentions it in passing
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