Vulnerability-Lookup

CVE-2026-83801 (GCVE-0-2026-83801)

Vulnerability from cvelistv5 – Published: 2026-09-22 19:44 – Updated: 2026-09-23 15:08

Title

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

Summary

Nautobot is a Network Source of Truth and Network Automation Platform. Prior to 2.4.37 and 3.1.8, a user with extras.add_relationship or extras.change_relationship permission can store HTML or JavaScript in a Relationship description, and a user with dcim.add_modulefamily or dcim.change_modulefamily permission can store it in a Module Family name. Nautobot assigns these values to form field help_text rendered by render_field.html through Django's |safe filter without adequate neutralization. The stored content executes in the authenticated browser session of any user, including an administrator or superuser, who opens an affected create or edit form. This can enable actions as the victim, session or token theft, and further privilege escalation. This issue is fixed in versions 2.4.37 and 3.1.8.

Severity

5.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-23 15:08 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/nautobot/nautobot/security/adv…	x_refsource_CONFIRM
https://github.com/nautobot/nautobot/commit/e6ff2…	x_refsource_MISC
https://github.com/nautobot/nautobot/commit/f8a62…	x_refsource_MISC
https://github.com/nautobot/nautobot/releases/tag…	x_refsource_MISC
https://github.com/nautobot/nautobot/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
nautobot	nautobot	Affected: < 2.4.37 Affected: >= 3.0.0, < 3.1.8	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-83801

Vulnerability from fkie_nvd - Published: 2026-09-22 20:17 - Updated: 2026-09-23 18:12

Severity

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/nautobot/nautobot/commit/e6ff20d50e0759135c6d278e7b2ceec56ed9b3c8
	security-advisories@github.com	https://github.com/nautobot/nautobot/commit/f8a62466f3ebc42759a6373e7c79b0cad5751c2f
	security-advisories@github.com	https://github.com/nautobot/nautobot/releases/tag/v2.4.37
	security-advisories@github.com	https://github.com/nautobot/nautobot/releases/tag/v3.1.8
	security-advisories@github.com	https://github.com/nautobot/nautobot/security/advisories/GHSA-56v6-2fhr-wxgq

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "nautobot",
          "vendor": "nautobot",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.4.37"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 3.1.8"
            }
          ]
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      ],
      "source": "security-advisories@github.com"
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    {
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    }
  ],
  "id": "CVE-2026-83801",
  "lastModified": "2026-09-23T18:12:04.247",
  "metrics": {
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          "privilegesRequired": "LOW",
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    },
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}

GHSA-56V6-2FHR-WXGQ

Vulnerability from github – Published: 2026-09-22 20:37 – Updated: 2026-09-22 20:37

Summary

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

Details

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.

Severity

5.4 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "nautobot"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.37"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "nautobot"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-83801"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-22T20:37:30Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nIt has two related instances that share the same root cause: a user-controlled model field is assigned verbatim to a form field\u0027s `help_text`, which is rendered with Django\u0027s `|safe` filter (`render_field.html`), bypassing auto-escaping.\n\nIn 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\u0027s 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.\n\n#### Relationship description\n\nA user who holds the add/change permission for Relationships (`extras.add_relationship` / `extras.change_relationship`) can set a Relationship\u0027s **description** to an HTML/JavaScript payload. That description is used as the help text of the relationship\u0027s form field and is rendered on the create/edit page of every object type the relationship applies to.\n\n#### Module Family name\n\nA 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\u0027s help text on the Module \"Install module\" form for any module bay assigned to that family.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nFixes are available in Nautobot v2.4.37+ \u0026 v3.1.8+\n\n\u003e 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.\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nThere is no configuration-only fix. To remediate without upgrading:\n\n- Restrict the `extras.add_relationship` / `extras.change_relationship` and `dcim.add_modulefamily` / `dcim.change_modulefamily` permissions to fully trusted administrators only.\n- Audit existing Relationship **description** values and Module Family **name** values for embedded HTML / `\u003cscript\u003e` content and remove any payloads.\n\nNote 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.\n\n### Credit\n\nCredit for this discovery goes to Habibullo Izzatilloyev.",
  "id": "GHSA-56v6-2fhr-wxgq",
  "modified": "2026-09-22T20:37:30Z",
  "published": "2026-09-22T20:37:30Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nautobot/nautobot/security/advisories/GHSA-56v6-2fhr-wxgq"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nautobot/nautobot/commit/e6ff20d50e0759135c6d278e7b2ceec56ed9b3c8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nautobot/nautobot/commit/f8a62466f3ebc42759a6373e7c79b0cad5751c2f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nautobot/nautobot"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nautobot/nautobot/releases/tag/v2.4.37"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nautobot/nautobot/releases/tag/v3.1.8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nautobot: Stored cross-site scripting (XSS) in object create/edit form help text"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-83801 (GCVE-0-2026-83801)

FKIE_CVE-2026-83801

GHSA-56V6-2FHR-WXGQ

Impact

Relationship description

Module Family name

Patches

Workarounds

Credit

Tags

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Nomenclature

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