FKIE_CVE-2026-46625

Vulnerability from fkie_nvd - Published: 2026-06-10 22:16 - Updated: 2026-09-09 13:20
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
JavaScript Cookie is a JavaScript API for handling cookies, client-side. Prior to version 3.0.7, js-cookie's internal assign() helper copies properties with for...in + plain assignment. When the source object is produced by JSON.parse, the JSON object's "__proto__" member is an own enumerable property, so the for…in enumerates it and the target[key] = source[key] write triggers the Object.prototype.__proto__ setter on the fresh target ({}). The result is a per-instance prototype hijack: Object.prototype itself is untouched, but the merged attributes object now inherits attacker-controlled keys. Because the consuming set() function then enumerates the merged object with another for...in, every key the attacker placed on the polluted prototype lands in the resulting Set-Cookie string as an attribute pair. The attacker can set domain=, secure=, samesite=, expires=, and path= on cookies whose attributes the developer thought were locked down. This issue has been patched in version 3.0.7.
References
security-advisories@github.comhttps://github.com/js-cookie/js-cookie/commit/eb3c40e89731e99b8970faaf35ddad249c6c0020Patch
security-advisories@github.comhttps://github.com/js-cookie/js-cookie/releases/tag/v3.0.7Release Notes
security-advisories@github.comhttps://github.com/js-cookie/js-cookie/security/advisories/GHSA-qjx8-664m-686jExploit, Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:33183Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36625Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:48126Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:48151Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:49642Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:52768Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:56338Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:56357Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:59153Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:60520
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-46625Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2487740Issue Tracking, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/js-cookie/js-cookie/security/advisories/GHSA-qjx8-664m-686jExploit, Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46625.jsonThird Party Advisory
Impacted products
Vendor Product Version
js-cookie javascript_cookie *
redhat 3scale_api_management 2.0
redhat ansible_automation_platform 2.0
redhat openshift_ai -
redhat openshift_lightspeed -
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
redhat enterprise_linux 10.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "js-cookie",
          "vendor": "js-cookie",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.0.7"
            }
          ]
        }
      ],
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          "product": "Cryostat 4 on RHEL 9",
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          "packageName": "grafana-pcp",
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          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
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          "product": "Red Hat Enterprise Linux 9",
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "js-cookie",
          "product": "Red Hat JBoss Enterprise Application Platform 7",
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        },
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          "packageName": "js-cookie",
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          "vendor": "Red Hat"
        },
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          ],
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          "product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
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        },
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          "cpes": [
            "cpe:/a:redhat:openshift_ai"
          ],
          "defaultStatus": "affected",
          "packageName": "rhoai/odh-mod-arch-eval-hub-rhel9",
          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        },
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          "cpes": [
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          ],
          "defaultStatus": "unaffected",
          "packageName": "openshift4/ose-agent-installer-ui-rhel9",
          "product": "Red Hat OpenShift Container Platform 4",
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      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
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      "value": "JavaScript Cookie is a JavaScript API for handling cookies, client-side. Prior to version 3.0.7, js-cookie\u0027s internal assign() helper copies properties with for...in + plain assignment. When the source object is produced by JSON.parse, the JSON object\u0027s \"__proto__\" member is an own enumerable property, so the for\u2026in enumerates it and the target[key] = source[key] write triggers the Object.prototype.__proto__ setter on the fresh target ({}). The result is a per-instance prototype hijack: Object.prototype itself is untouched, but the merged attributes object now inherits attacker-controlled keys. Because the consuming set() function then enumerates the merged object with another for...in, every key the attacker placed on the polluted prototype lands in the resulting Set-Cookie string as an attribute pair. The attacker can set domain=, secure=, samesite=, expires=, and path= on cookies whose attributes the developer thought were locked down. This issue has been patched in version 3.0.7."
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      "value": "JavaScript Cookie es una API de JavaScript para manejar cookies, del lado del cliente. Antes de la versi\u00f3n 3.0.7, la funci\u00f3n auxiliar interna assign() de js-cookie copia propiedades con for...in + asignaci\u00f3n simple. Cuando el objeto fuente es producido por JSON.parse, el miembro __proto__ del objeto JSON es una propiedad enumerable propia, por lo que el for...in lo enumera y la escritura target[key] = source[key] activa el setter Object.prototype.__proto__ en el nuevo objetivo ({}). El resultado es un secuestro de prototipo por instancia: Object.prototype en s\u00ed no se modifica, pero el objeto de atributos fusionados ahora hereda claves controladas por el atacante. Debido a que la funci\u00f3n set() consumidora luego enumera el objeto fusionado con otro for...in, cada clave que el atacante coloc\u00f3 en el prototipo contaminado termina en la cadena Set-Cookie resultante como un par de atributos. El atacante puede establecer domain=, secure=, samesite=, expires=, y path= en cookies cuyos atributos el desarrollador pens\u00f3 que estaban bloqueados. Este problema ha sido parcheado en la versi\u00f3n 3.0.7."
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}



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Tags
Taxonomy of the tags.





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

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.



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.