CVE-2026-73647
Quasar Framework: Prototype pollution in Quasar extend() utility
Description
Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.22.0, the public extend() utility in ui/src/utils/extend/extend.js recursively copied attacker-controlled object keys during extend(true, target, source) deep merges without rejecting an own __proto__ property. The merge could descend into the prototype object and write attacker-controlled properties to Object.prototype in the same JavaScript process. Applications that passed user-controlled or partially user-controlled objects to extend() could experience logic bypass, unsafe default-option injection, denial of service, or other application-specific impact when polluted properties were later consumed. This issue is fixed in version 2.22.0.
INFO
Published Date :
Aug. 13, 2026, 6:18 p.m.
Last Modified :
Oct. 24, 2026, 3:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Quasar Framework to version 2.22.0.
- Avoid passing user-controlled objects to extend().
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-73647.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-73647 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-73647
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-73647 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-73647 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: quasar de quasarframework, Description: Quasar Framework es un framework para construir interfaces de usuario Vue.js de alto rendimiento. Antes de la 2.22.0, la utilidad pública extend() en ui/src/utils/extend/extend.js copiaba recursivamente claves de objeto controladas por el atacante durante las fusiones profundas extend(true, target, source) sin rechazar una propiedad __proto__ propia. La fusión podía descender al objeto prototipo y escribir propiedades controladas por el atacante en Object.prototype en el mismo proceso de JavaScript. Las aplicaciones que pasaban objetos controlados por el usuario o parcialmente controlados por el usuario a extend() podían experimentar omisión de lógica, inyección insegura de opciones predeterminadas, denegación de servicio u otro impacto específico de la aplicación cuando las propiedades contaminadas eran consumidas posteriormente. Este problema está corregido en la versión 2.22.0. Title: quasar de quasarframework, Description: Quasar Framework es un framework para construir interfaces de usuario Vue.js de alto rendimiento. Antes de la 2.22.0, la utilidad pública extend() en ui/src/utils/extend/extend.js copiaba recursivamente claves de objeto controladas por el atacante durante las fusiones profundas extend(true, target, source) sin rechazar una propiedad __proto__ propia. La fusión podía descender al objeto prototipo y escribir propiedades controladas por el atacante en Object.prototype en el mismo proceso de JavaScript. Las aplicaciones que pasaban objetos controlados por el usuario o parcialmente controlados por el usuario a extend() podían experimentar omisión de lógica, inyección insegura de opciones predeterminadas, denegación de servicio u otro impacto específico de la aplicación cuando las propiedades contaminadas eran consumidas posteriormente. Este problema está corregido en la versión 2.22.0. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: quasar de quasarframework, Description: Quasar Framework es un framework para construir interfaces de usuario Vue.js de alto rendimiento. Antes de la 2.22.0, la utilidad pública extend() en ui/src/utils/extend/extend.js copiaba recursivamente claves de objeto controladas por el atacante durante las fusiones profundas extend(true, target, source) sin rechazar una propiedad __proto__ propia. La fusión podía descender al objeto prototipo y escribir propiedades controladas por el atacante en Object.prototype en el mismo proceso de JavaScript. Las aplicaciones que pasaban objetos controlados por el usuario o parcialmente controlados por el usuario a extend() podían experimentar omisión de lógica, inyección insegura de opciones predeterminadas, denegación de servicio u otro impacto específico de la aplicación cuando las propiedades contaminadas eran consumidas posteriormente. Este problema está corregido en la versión 2.22.0. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 13, 2026
Action Type Old Value New Value Added Reference https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j Added SSVC {'id': 'CVE-2026-73647', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-13T18:41:13.711876Z'} -
New CVE Received by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'quasarframework', 'product': 'quasar', 'versions': [{'status': 'affected', 'version': '< 2.22.0'}]}] Added Description Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.22.0, the public extend() utility in ui/src/utils/extend/extend.js recursively copied attacker-controlled object keys during extend(true, target, source) deep merges without rejecting an own __proto__ property. The merge could descend into the prototype object and write attacker-controlled properties to Object.prototype in the same JavaScript process. Applications that passed user-controlled or partially user-controlled objects to extend() could experience logic bypass, unsafe default-option injection, denial of service, or other application-specific impact when polluted properties were later consumed. This issue is fixed in version 2.22.0. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Added CWE CWE-1321 Added Reference https://github.com/quasarframework/quasar/commit/d0a95d95ab3c29d13e1b8ba8c5e5025fd6ce35e7 Added Reference https://github.com/quasarframework/quasar/releases/tag/quasar-v2.22.0 Added Reference https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j