How severe is CVE-2026-83801?

CVE-2026-83801 has a CVSS score of 5.4/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2026-83801?

CVE-2026-83801 affects the following packages: nautobot (PyPI), nautobot (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2026-83801?

Update nautobot to 2.4.37 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-83801 is resolved across your whole dependency graph.

How do I detect CVE-2026-83801 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nautobot, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-83801 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2026-83801 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-83801 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-83801?

CVE-2026-83801 has an EPSS (Exploit Prediction Scoring System) score of 0.2%, placing it in the 12th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-83801?

CVE-2026-83801 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2026-83801 published, and has it been updated?

CVE-2026-83801 was published on September 22, 2026 and was last updated on October 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍

🐍 PyPI

Not in CISA KEV

MEDIUM severity

CVE-2026-83801 — nautobot

MEDIUMFix: nautobot/nautobot@e6ff20d

CVE-2026-83801 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in nautobot. A fix is available for nautobot — see the affected versions and patch details below.

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

Also known asGHSA-56v6-2fhr-wxgqPYSEC-2026-4110

Published

Sep 22, 2026

Updated

Oct 21, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Oct 22, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-83801.

EPSS Exploitation Probability

via FIRST.org ↗

0.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs12th percentile — riskier than 12% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-83801 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 394,415 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

2 pkgs affected

🐍nautobot🐍nautobot

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

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 help_text, which is rendered with Django's |safe filter (render_field.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.add_relationship / extras.change_relationship) 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 type the relationship applies to.

Module Family name

A user who holds the add/change permission for Module Families (dcim.add_modulefamily / dcim.change_modulefamily) can put a payload in a Module Family name, which is interpolated into the module_family field's help text on the Module "Install module" form for any module bay assigned to that family.

Patches

Has the problem been patched? What versions should users upgrade to?

Fixes are available in Nautobot v2.4.37+ & v3.1.8+

Note: The underlying weakness exists in earlier EOL versions of Nautobot (v1.x). Users on those older EOL versions are highly encouraged to upgrade to a supported version.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

There is no configuration-only fix. To remediate without upgrading:

Restrict the extras.add_relationship / extras.change_relationship and dcim.add_modulefamily / dcim.change_modulefamily permissions to fully trusted administrators only.
Audit existing Relationship description values and Module Family name values for embedded HTML / <script> content and remove any payloads.

Note that limiting who can open create/edit forms does not fully mitigate the issue, since the payload targets any user (including admins) who opens an affected form.

Credit

Credit for this discovery goes to Habibullo Izzatilloyev.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`nautobot`	all versions	2.4.37`pip install --upgrade 'nautobot==2.4.37'`
🐍PyPI	`nautobot`	≥ 3.0.0&&< 3.1.8	3.1.8`pip install --upgrade 'nautobot==3.1.8'`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nautobot, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nautobot to 2.4.37 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-83801 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### 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 `help_text`, which is rendered with Django's `|safe` filter (`render_field.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 pr