Описание
fast-uri is a URI parser for Node.js. It decodes percent escapes in a hostname during parsing and then decodes the parsed hostname a second time during authority recomposition, so a single call to normalize or resolve can turn nested percent-encoded input into a different network destination such as a loopback hostname or address. For example, a doubly encoded host that spells out a loopback name decodes to that live host in one operation, which contradicts RFC 3986 section 2.4 that an implementation must not decode the same string more than once. An application that normalizes or resolves an untrusted HTTP-family URI before outbound routing, redirect validation, or a host-policy check can receive a destination different from the one the original encoded host represented, giving a server-side request forgery and host-policy bypass primitive. This is an incomplete-fix variant of CVE-2026-6322. The affected versions are 2.4.1 up to but not including 2.4.5, 3.1.2 up to but not including 3.1.6, and 4.0.0 up to but not including 4.1.3. The issue is fixed in 2.4.5, 3.1.6, and 4.1.3, which normalize percent escapes once and preserve encoded percent signs. Users should upgrade to a patched version.
A flaw was found in fast-uri, a URI parser for Node.js. The component incorrectly decodes percent escapes in a hostname twice during URI parsing and authority recomposition. This double decoding can allow a remote attacker to manipulate a URI to point to a different network destination, such as a loopback address. This vulnerability can lead to Server-Side Request Forgery (SSRF) and bypass host-based security policies.
Отчет
This flaw in the fast-uri library, used by applications for URI parsing, allows for Server-Side Request Forgery (SSRF) and host-policy bypass. By crafting a doubly percent-encoded hostname in an untrusted HTTP-family URI, an attacker could redirect internal application requests to arbitrary network destinations, potentially bypassing security controls and accessing internal services. This risk is present in Red Hat products that process untrusted URIs using affected versions of fast-uri.
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-solution-server-rhel9 | Affected | ||
| Migration Toolkit for Containers | rhmtc/openshift-migration-ui-rhel8 | Affected | ||
| Multicluster Engine for Kubernetes | multicluster-engine/console-mce-rhel9 | Affected | ||
| Network Observability Operator | network-observability/network-observability-console-plugin-pf5-rhel9 | Affected | ||
| Network Observability Operator | network-observability/network-observability-console-plugin-rhel9 | Affected | ||
| OpenShift Lightspeed | openshift-lightspeed/lightspeed-agentic-console-rhel9 | Affected | ||
| OpenShift Lightspeed | openshift-lightspeed/lightspeed-console-plugin-419-rhel9 | Affected | ||
| OpenShift Lightspeed | openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9 | Affected | ||
| OpenShift Lightspeed | openshift-lightspeed/lightspeed-console-plugin-rhel9 | Affected | ||
| OpenShift Pipelines | openshift-pipelines/pipelines-console-plugin-pf5-rhel9 | Affected |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
fast-uri is a URI parser for Node.js. It decodes percent escapes in a hostname during parsing and then decodes the parsed hostname a second time during authority recomposition, so a single call to normalize or resolve can turn nested percent-encoded input into a different network destination such as a loopback hostname or address. For example, a doubly encoded host that spells out a loopback name decodes to that live host in one operation, which contradicts RFC 3986 section 2.4 that an implementation must not decode the same string more than once. An application that normalizes or resolves an untrusted HTTP-family URI before outbound routing, redirect validation, or a host-policy check can receive a destination different from the one the original encoded host represented, giving a server-side request forgery and host-policy bypass primitive. This is an incomplete-fix variant of CVE-2026-6322. The affected versions are 2.4.1 up to but not including 2.4.5, 3.1.2 up to but not includin...
fast-uri is a URI parser for Node.js. It decodes percent escapes in a hostname during parsing and then decodes the parsed hostname a second time during authority recomposition, so a single call to normalize or resolve can turn nested percent-encoded input into a different network destination such as a loopback hostname or address. For example, a doubly encoded host that spells out a loopback name decodes to that live host in one operation, which contradicts RFC 3986 section 2.4 that an implementation must not decode the same string more than once. An application that normalizes or resolves an untrusted HTTP-family URI before outbound routing, redirect validation, or a host-policy check can receive a destination different from the one the original encoded host represented, giving a server-side request forgery and host-policy bypass primitive. This is an incomplete-fix variant of CVE-2026-6322. The affected versions are 2.4.1 up to but not including 2.4.5, 3.1.2 up to but not including 3
fast-uri is a URI parser for Node.js. It decodes percent escapes in a ...
fast-uri vulnerable to server-side request forgery via repeated hostname percent-decoding
EPSS
7.5 High
CVSS3