Vulnerability-Lookup

CVE-2026-48795 (GCVE-0-2026-48795)

Vulnerability from cvelistv5 – Published: 2026-07-15 21:23 – Updated: 2026-07-16 18:49

Title

Incomplete fix for CVE-2026-25754 in @adonisjs/bodyparser

Summary

AdonisJS is a TypeScript-first web framework. From 10.1.3 until 10.1.5 and 11.0.3, AdonisJS @adonisjs/bodyparser incompletely fixed CVE-2026-25754 because nested multipart field payloads such as user.__proto__.polluted and constructor.prototype still caused lodash _.set() via @poppinss/utils to create plain intermediate objects and pollute Object.prototype. This issue is fixed in versions 10.1.5 and 11.0.3.

Severity

8.6 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Assigner

GitHub_M

References

5 references

URL	Tags
https://github.com/adonisjs/core/security/advisor…	x_refsource_CONFIRM
https://github.com/adonisjs/bodyparser/commit/8a8…	x_refsource_MISC
https://github.com/adonisjs/bodyparser/commit/aa9…	x_refsource_MISC
https://github.com/adonisjs/bodyparser/releases/t…	x_refsource_MISC
https://github.com/adonisjs/bodyparser/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
adonisjs	core	Affected: >= 10.1.3, < 10.1.5 Affected: >= 11.0.0-next.9, < 11.0.3

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-48795

Vulnerability from fkie_nvd - Published: 2026-07-15 22:16 - Updated: 2026-07-16 19:16

Severity

8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/adonisjs/bodyparser/commit/8a85eb0c2061b0caca10faedbfc2cf24b56cf9f6
	security-advisories@github.com	https://github.com/adonisjs/bodyparser/commit/aa96908f7b3f64c19e15d2d2d916b69137bdf469
	security-advisories@github.com	https://github.com/adonisjs/bodyparser/releases/tag/v10.1.5
	security-advisories@github.com	https://github.com/adonisjs/bodyparser/releases/tag/v11.0.3
	security-advisories@github.com	https://github.com/adonisjs/core/security/advisories/GHSA-qcm7-3vpr-hj5h

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "core",
          "vendor": "adonisjs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 10.1.3, \u003c 10.1.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 11.0.0-next.9, \u003c 11.0.3"
            }
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    }
  ],
  "id": "CVE-2026-48795",
  "lastModified": "2026-07-16T19:16:49.773",
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GHSA-QCM7-3VPR-HJ5H

Vulnerability from github – Published: 2026-06-30 18:34 – Updated: 2026-06-30 18:34

Summary

@adonisjs/bodyparser has an incomplete fix for CVE-2026-25754

Details

Summary

The fix for GHSA-f5x2-vj4h-vg4c / CVE-2026-25754 introduced in commit 40e1c71 is incomplete and can be bypassed through nested prototype pollution payloads.

The original patch replaced the internal FormFields storage object with Object.create(null), preventing direct payloads such as __proto__.polluted. However, payloads containing a non-dangerous segment before __proto__ or constructor.prototype, such as user.__proto__.polluted, still lead to Object.prototype pollution.

This issue is exploitable remotely through a single unauthenticated multipart/form-data request using the default configuration.

Affected versions

>= 10.1.3 < 10.1.5
>= 11.0.0-next.9 < 11.0.3

Details

The regression tests added by the original fix only covered direct payloads such as:

__proto__.polluted
constructor.prototype.polluted

These payloads are blocked because the root object no longer inherits from Object.prototype.

However, lodash _.set() (via @poppinss/utils) still creates intermediate objects using plain {} values. Once a normal segment is encountered, subsequent __proto__ or constructor.prototype segments regain access to Object.prototype.

Impact

An unauthenticated attacker can remotely pollute Object.prototype on any route accepting multipart/form-data requests behind BodyParserMiddleware.

Because the pollution is process-wide, the impact may include authorization bypasses, unexpected behavior in downstream libraries, or prototype pollution gadget chains leading to remote code execution.

Patches

Fixes targeting v6 and v7 have been published below.

Users should upgrade to a version that includes the following fix:

https://github.com/adonisjs/bodyparser/releases/tag/v10.1.5
https://github.com/adonisjs/bodyparser/releases/tag/v11.0.3

References

CWE-1321
Prior advisory this bypasses: GHSA-f5x2-vj4h-vg4c / CVE-2026-25754

Severity

8.6 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 10.1.4"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@adonisjs/bodyparser"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "10.1.3"
            },
            {
              "fixed": "10.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 11.0.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@adonisjs/bodyparser"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "11.0.0-next.9"
            },
            {
              "fixed": "11.0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-48795"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-30T18:34:32Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n\nThe fix for [GHSA-f5x2-vj4h-vg4c](https://github.com/adonisjs/core/security/advisories/GHSA-f5x2-vj4h-vg4c) / CVE-2026-25754 introduced in commit [`40e1c71`](https://github.com/adonisjs/bodyparser/commit/40e1c71f958cffb74f6b91bed6630dca979062ed) is incomplete and can be bypassed through nested prototype pollution payloads.\n\nThe original patch replaced the internal `FormFields` storage object with `Object.create(null)`, preventing direct payloads such as `__proto__.polluted`. However, payloads containing a non-dangerous segment before `__proto__` or `constructor.prototype`, such as `user.__proto__.polluted`, still lead to `Object.prototype` pollution.\n\nThis issue is exploitable remotely through a single unauthenticated `multipart/form-data` request using the default configuration.\n\n### Affected versions\n\n- `\u003e= 10.1.3 \u003c 10.1.5`\n- `\u003e= 11.0.0-next.9 \u003c 11.0.3`\n\n### Details\n\nThe regression tests added by the original fix only covered direct payloads such as:\n\n- `__proto__.polluted`\n- `constructor.prototype.polluted`\n\nThese payloads are blocked because the root object no longer inherits from `Object.prototype`.\n\nHowever, lodash `_.set()` (via `@poppinss/utils`) still creates intermediate objects using plain `{}` values. Once a normal segment is encountered, subsequent `__proto__` or `constructor.prototype` segments regain access to `Object.prototype`.\n\n### Impact\n\nAn unauthenticated attacker can remotely pollute `Object.prototype` on any route accepting multipart/form-data requests behind `BodyParserMiddleware`.\n\nBecause the pollution is process-wide, the impact may include authorization bypasses, unexpected behavior in downstream libraries, or prototype pollution gadget chains leading to remote code execution.\n\n### Patches\n\nFixes targeting v6 and v7 have been published below.\n\nUsers should upgrade to a version that includes the following fix:\n\n- https://github.com/adonisjs/bodyparser/releases/tag/v10.1.5\n- https://github.com/adonisjs/bodyparser/releases/tag/v11.0.3\n\n### References\n\n- [CWE-1321](https://cwe.mitre.org/data/definitions/1321.html)\n- Prior advisory this bypasses: [GHSA-f5x2-vj4h-vg4c](https://github.com/adonisjs/core/security/advisories/GHSA-f5x2-vj4h-vg4c) / CVE-2026-25754",
  "id": "GHSA-qcm7-3vpr-hj5h",
  "modified": "2026-06-30T18:34:32Z",
  "published": "2026-06-30T18:34:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/adonisjs/core/security/advisories/GHSA-f5x2-vj4h-vg4c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/adonisjs/core/security/advisories/GHSA-qcm7-3vpr-hj5h"
    },
    {
      "type": "WEB",
      "url": "https://github.com/adonisjs/bodyparser/commit/40e1c71f958cffb74f6b91bed6630dca979062ed"
    },
    {
      "type": "WEB",
      "url": "https://github.com/adonisjs/bodyparser/releases/tag/v10.1.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/adonisjs/bodyparser/releases/tag/v11.0.3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/adonisjs/core"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@adonisjs/bodyparser has an incomplete fix for CVE-2026-25754"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-48795 (GCVE-0-2026-48795)

FKIE_CVE-2026-48795

GHSA-QCM7-3VPR-HJ5H

Summary

Affected versions

Details

Impact

Patches

References

Tags

Sightings

Nomenclature