Nautobot: Stored cross-site scripting (XSS) in object create/edit form help text

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.4 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

• CVE-2026-83801: 0.30% estimated exploitation activity in the next 30 days; percentile 22.60 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact What kind of vulnerability is it? Who is impacted? It has two related instances that share the same root cause: a user-controlled model field is assigned verbatim to a form field's helptext, which is rendered with Django's |safe filter (renderfield.html), bypassing auto-escaping. In both cases the script executes in the browser of any user who opens an affected create or edit form, including administrators and superusers. Because the payload runs in the victim's authenticated session, it can lead to actions performed as the victim, session/token theft, and further privilege escalation. Exploitation requires the victim to open an affected form. Relationship description A user who holds the add/change permission for Relationships (extras.addrelationship / extras.changerelationship) can set a Relationship's description to an HTML/JavaScript payload. That description is used as the help text of the relationship's form field and is rendered on the create/edit page of every object…

Published by the source

22 Sep 2026, 20:37 UTC

Last modified by the source

1 Oct 2026, 17:55 UTC

Source last checked

26 Oct 2026, 13:54 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-56v6-2fhr-wxgq

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-56v6-2fhr-wxgq

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-56v6-2fhr-wxgq

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# Patch Next advisory brief: CVE-2026-83801

Advisory: Nautobot: Stored cross-site scripting (XSS) in object create/edit form help text
IDs: CVE-2026-83801, GHSA-56v6-2fhr-wxgq
Record: https://patchnext.com/advisories/cve-2026-83801 (revision 3, source checked 26 Oct 2026, 13:54 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: nautobot 3.1.8, 2.4.37. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI nautobot: affected < 2.4.37; >= 3.0.0, < 3.1.8; fixed in 2.4.37, 3.1.8

## Suggested inspection (read-only)
- `python -m pip show nautobot`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on nautobot.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-56v6-2fhr-wxgq (GitHub-reviewed advisory GHSA-56v6-2fhr-wxgq lists affected ranges: PyPI nautobot >=0 =3.0.0 <3.1.8)
- Verified: https://osv.dev/vulnerability/GHSA-56v6-2fhr-wxgq (OSV record GHSA-56v6-2fhr-wxgq lists affected ranges: PyPI nautobot >=0 =3.0.0 <3.1.8 (fixed))

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