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CVE-2026-83801 medium CVSS 5.4

Cross-Site Scripting (XSS) in nautobot (CVE-2026-83801)

Summary

Cross-site scripting in nautobot (CVE-2026-83801). Risk of unauthorized operations or information disclosure. Exploitable via help_text. Mitigation: upgrade to 3.1.8 or later.

Original description

The description as published by the source.

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 a…

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-83801 has been found in nautobot.
Attackers can target a specific entry point like help_text over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.4/10.
What to do: upgrade nautobot to 3.1.8 or later.
If unsure, ask your IT team or search "nautobot CVE-2026-83801" on the vendor's site.

CVE-2026-83801 (nautobot) — CWE-79 / CVSS v3 5.4
Attack vector: remote (network-reachable)
Attack surface: help_text / render_field.html / extras.add_relationship / extras.change_relationship
Patched: 3.1.8 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Cross-site scripting (XSS) (CWE-79) exists in nautobot. Attackers reach the vulnerable code path via help_text.

📍 Affected scope

Check the vendor advisory for the affected versions of nautobot. Attack surface: help_text / render_field.html / extras.add_relationship / extras.change_relationship.

🔥 Severity

Severity: Medium (CVSS 5.4/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 3.1.8.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'nautobot' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'nautobot' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で nautobot を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade nautobot to 3.1.8

    ステージング環境で 3.1.8 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

pip nautobot
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.8"}]}]

References

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