CVE-2026-101909 (GCVE-0-2026-101909)

Vulnerability from cvelistv5 – Published: 2026-09-28 17:42 – Updated: 2026-09-28 17:42
VLAI
Title
Axios: Prototype Pollution Gadget in axios toFormData Options
Summary
Axios is a promise-based HTTP client for the browser and Node.js. From 0.28.0 until 0.34.0 and 1.15.1 until 1.20.0, ToFormData processes inherited serialization options and visitor properties supplied through prototype pollution. A separate same-process prototype-pollution flaw supplies inherited dots, indexes, metaTokens, maxDepth, visitor, or Blob values before object serialization. The inherited options alter toFormData field naming and data interpretation, maxDepth can force request failure, Blob changes value handling, and a polluted visitor can execute when an attacker already has the stronger ability to inject a function. Serialized field naming and data interpretation can change, maxDepth can cause request failure, Blob can alter value handling, and a polluted visitor can execute under the stronger function-injection primitive. This issue is fixed in versions 0.34.0 and 1.20.0.
Severity
8.3 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
Impacted products
Vendor Product Version CPE status
axios axios Affected: >= 1.15.1, < 1.20.0
Affected: >= 0.28.0, < 0.34.0
guessed Create a notification for this product.
Show details on NVD website
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          "versions": [
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          "url": "https://github.com/axios/axios/pull/11141"
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          "url": "https://github.com/axios/axios/commit/d29be181f85f6fe93397a07b1f69606d9622637b"
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        "discovery": "UNKNOWN"
      },
      "title": "Axios: Prototype Pollution Gadget in axios toFormData Options"
    }
  },
  "cveMetadata": {
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    "datePublished": "2026-09-28T17:42:40.203Z",
    "dateReserved": "2026-09-28T15:55:37.907Z",
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            "value": "Axios is a promise-based HTTP client for the browser and Node.js. From 0.28.0 until 0.34.0 and 1.15.1 until 1.20.0, ToFormData processes inherited serialization options and visitor properties supplied through prototype pollution. A separate same-process prototype-pollution flaw supplies inherited dots, indexes, metaTokens, maxDepth, visitor, or Blob values before object serialization. The inherited options alter toFormData field naming and data interpretation, maxDepth can force request failure, Blob changes value handling, and a polluted visitor can execute when an attacker already has the stronger ability to inject a function. Serialized field naming and data interpretation can change, maxDepth can cause request failure, Blob can alter value handling, and a polluted visitor can execute under the stronger function-injection primitive. This issue is fixed in versions 0.34.0 and 1.20.0."
          }
        ],
        "id": "CVE-2026-101909",
        "lastModified": "2026-09-28T18:17:19.680",
        "metrics": {
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                "modifiedSubIntegrityImpact": "NOT_DEFINED",
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      "cve": "CVE-2026-101909",
      "id": "CVE-2026-101909",
      "initial_release_date": "2026-09-28T17:42:40.203000+00:00",
      "product_status:known_affected": "3",
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      "source": "Red Hat CSAF VEX",
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      "title": "axios: axios: Denial of Service via prototype pollution gadget in form serialization",
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      "cve": "CVE-2026-101909",
      "id": "CVE-2026-101909",
      "initial_release_date": "2026-09-29T23:39:48Z",
      "product_status:known_affected": "109",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-101909",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-101909.json",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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.