XSS in Netbox-Community Netbox
CVE-2026-104073
NetBox versions 2.9.5 before 4.7.0 contain a server-side template injection vulnerability that allows a low-privileged user with the "Can add custom links" permission to steal session cookies and API tokens of other users by exposing the raw Django HttpRequest object to the Jinja2 template context. Attackers can craft a custom link template embedding request.COOKIES['sessionid'] or a user's API token into an img src URL, which bypasses the clean_html sanitizer and auto-exfiltrates the victim's credentials to an attacker-controlled host when a privileged user views the object, enabling full account takeover.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/netbox-community/netbox/releases (release-notes)
- github.com/netbox-community/netbox/issues/22607 (issue-tracking)
- github.com/netbox-community/netbox/pull/22616 (patch)
- www.vulncheck.com/advisories/netbox-session-hijacking-via-custom-links (third-party-advisory)
Frequently asked questions
- What is CVE-2026-104073?
- CVE-2026-104073 is a high-severity vulnerability in Netbox-Community Netbox, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-10-06.
- How severe is CVE-2026-104073?
- High severity. CVSS v3 base score is 7.6 out of 10.