CVE-2026-84739
Last modified
CVE-2026-84739 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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..
Description
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| GitLab | GitLab | >= 13.11, < 19.2.7; >= 19.3, < 19.3.3; >= 19.4, < 19.4.1 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-84739?
How severe is CVE-2026-84739?
How do I fix CVE-2026-84739?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-84720A flaw was found in the Ansible Automation Platform automati…6.5
- CVE-2026-84721A server-side request forgery flaw was found in the Ansible …6.4
- CVE-2026-84724An argument-injection flaw was found in the Ansible Automati…6.6
- CVE-2026-84732Retransmissions of ACK packet ID in OpenVPN through 2.6.22 a…8.7
- CVE-2026-84736In the current development version of Eclipse aeriOS, for wh…8.3
- CVE-2026-84738The AF Companion WordPress plugin before 2.2.0 does not val…9.1
- CVE-2026-8474A vulnerability was discovered on Stormshield Network Securi…5.3
- CVE-2026-84741The Events Calendar WordPress plugin before 6.17.5 does not …5.3
- CVE-2026-84742The Events Calendar WordPress plugin before 6.17.5 does not …2.7
- CVE-2026-84743The Events Calendar WordPress plugin before 6.17.5 does not …3.8
- CVE-2026-84744The WPForms Lite WordPress plugin from 1.5.0.1 to 2.0.2 does…6.5
- CVE-2026-84745The Events Calendar WordPress plugin before 6.17.3.1 does no…2.7
Are you affected by CVE-2026-84739?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST