Описание
undici's cache interceptor mishandles malformed Cache-Control private directives. In undici 7.0.0 up to before 7.29.0 and 8.0.0 up to before 8.9.0, a response carrying a degenerate qualified private directive, such as private set to an empty value, can be stored in the default shared cache and later served to a different caller with the same cache key, disclosing private response bodies and headers including Set-Cookie. Separately, a Cache-Control header that combines an unqualified private directive with a qualified one triggers an uncaught TypeError in the cache-control parser, which rejects the request and, depending on the consumer's error handling, can terminate the process. Both issues affect applications using the cache interceptor in shared mode, including the default configuration. The issues are fixed in undici 7.29.0 and 8.9.0.
A flaw was found in undici. This vulnerability allows for cross-user information disclosure when malformed Cache-Control private directives cause private response bodies and headers, such as Set-Cookie data, to be stored in a shared cache and subsequently exposed to other users. Additionally, a specially crafted Cache-Control header can trigger an unhandled error in the cache parser, leading to a process termination and a Denial of Service (DoS). Both issues affect applications using the cache interceptor in shared mode.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Hardened Images | grafana12.4 | Not affected | ||
| Red Hat Hardened Images | jaeger | Not affected | ||
| Red Hat Hardened Images | nodejs25 | Will not fix | ||
| Red Hat Hardened Images | prometheus3.13 | Not affected | ||
| Red Hat Hardened Images | rust | Not affected | ||
| Red Hat Hardened Images | nodejs26-main-26.5.1-1.5.hum1 | Fixed | RHSA-2026:48273 | 29.07.2026 |
| Red Hat Hardened Images | nodejs24-main-24.18.1-0.1.hum1 | Fixed | RHSA-2026:48537 | 30.07.2026 |
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Дополнительная информация
Статус:
EPSS
7.4 High
CVSS3
Связанные уязвимости
undici's cache interceptor mishandles malformed Cache-Control private directives. In undici 7.0.0 up to before 7.29.0 and 8.0.0 up to before 8.9.0, a response carrying a degenerate qualified private directive, such as private set to an empty value, can be stored in the default shared cache and later served to a different caller with the same cache key, disclosing private response bodies and headers including Set-Cookie. Separately, a Cache-Control header that combines an unqualified private directive with a qualified one triggers an uncaught TypeError in the cache-control parser, which rejects the request and, depending on the consumer's error handling, can terminate the process. Both issues affect applications using the cache interceptor in shared mode, including the default configuration. The issues are fixed in undici 7.29.0 and 8.9.0.
undici's cache interceptor mishandles malformed Cache-Control private directives. In undici 7.0.0 up to before 7.29.0 and 8.0.0 up to before 8.9.0, a response carrying a degenerate qualified private directive, such as private set to an empty value, can be stored in the default shared cache and later served to a different caller with the same cache key, disclosing private response bodies and headers including Set-Cookie. Separately, a Cache-Control header that combines an unqualified private directive with a qualified one triggers an uncaught TypeError in the cache-control parser, which rejects the request and, depending on the consumer's error handling, can terminate the process. Both issues affect applications using the cache interceptor in shared mode, including the default configuration. The issues are fixed in undici 7.29.0 and 8.9.0.
undici's cache interceptor mishandles malformed Cache-Control private ...
undici vulnerable to cross-user information disclosure and parse-time crash via degenerate private cache directives
EPSS
7.4 High
CVSS3