CVE-2026-84739
â ī¸ highSummary
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.
CVSS Score
8.7
High
EPSS Score
0.5
Exploit Probability
Published Date
2026-09-29
First Seen: 2026-10-03
đ Relative Risk Intelligence
This CVE is High Risk - more severe than 80.8% of all 365,890 vulnerabilities in our database.
#70,115
Top 25% most severe
Severity Percentile
đ¯ CISA SSVC Assessment Updated: Sep 29, 2026
đ Exploitation Status
None
No known exploits
âī¸ Automatable
NO
Requires human interaction
đĨ Technical Impact
Total
Complete system compromise possible
đ Discovered By
Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program
SSVC data provided by
CISA
Last Modified
2026-10-05
Source
NVD đ
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CWE IDs (Weakness Types)