Описание
fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. In versions 4.1.3 through 5.3.5, the XML parser can be forced to do an unlimited amount of entity expansion. With a very small XML input, it’s possible to make the parser spend seconds or even minutes processing a single request, effectively freezing the application. Version 5.3.6 fixes the issue. As a workaround, avoid using DOCTYPE parsing by processEntities: false option.
A denial of service flaw was found in fast-xml-parser. A remote attacker can exploit this vulnerability by providing a specially crafted, small XML input. This input can force the XML parser to perform an unlimited amount of entity expansion, consuming excessive resources. This can lead to the application freezing for an extended period, resulting in a Denial of Service (DoS).
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Migration Toolkit for Applications 8 | mta/mta-ui-rhel9 | Affected | ||
| Red Hat OpenShift GitOps | openshift-gitops-1/argocd-rhel8 | Will not fix | ||
| Red Hat OpenShift GitOps | openshift-gitops-1/argocd-rhel9 | Will not fix | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/kubevirt-console-plugin | Affected | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/kubevirt-console-plugin-rhel9 | Affected | ||
| Red Hat Satellite 6 | satellite/iop-vulnerability-frontend-rhel9 | Not affected | ||
| Self-service automation portal 2 | ansible-automation-platform/automation-portal | Affected | ||
| Red Hat Advanced Cluster Security 4.8 | advanced-cluster-security/rhacs-main-rhel8 | Fixed | RHSA-2026:7110 | 08.04.2026 |
| Red Hat Advanced Cluster Security 4.9 | advanced-cluster-security/rhacs-main-rhel8 | Fixed | RHSA-2026:7128 | 08.04.2026 |
| Red Hat Developer Hub 1.8 | rhdh/rhdh-hub-rhel9 | Fixed | RHSA-2026:6174 | 30.03.2026 |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. In versions 4.1.3 through 5.3.5, the XML parser can be forced to do an unlimited amount of entity expansion. With a very small XML input, it’s possible to make the parser spend seconds or even minutes processing a single request, effectively freezing the application. Version 5.3.6 fixes the issue. As a workaround, avoid using DOCTYPE parsing by `processEntities: false` option.
fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. In versions 4.1.3 through 5.3.5, the XML parser can be forced to do an unlimited amount of entity expansion. With a very small XML input, it’s possible to make the parser spend seconds or even minutes processing a single request, effectively freezing the application. Version 5.3.6 fixes the issue. As a workaround, avoid using DOCTYPE parsing by `processEntities: false` option.
fast-xml-parser allows users to validate XML, parse XML to JS object, ...
fast-xml-parser affected by DoS through entity expansion in DOCTYPE (no expansion limit)
EPSS
7.5 High
CVSS3