CVE-2026-7768— @fastify/accepts-serializer vulnerable to Denial of Service via Unbounded Accept Header Cache Growth

@fastify/accepts-serializer vulnerable to Denial of Service via Unbounded Accept Header Cache Growth

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded, eventually exhausting the Node.js heap and crashing the process. Versions <= 6.0.3 are affected. Update to 6.0.4 or later, which bounds the cache via an LRU with a default size of 100 entries, configurable through the new cacheSize plugin option.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

不加限制或调节的资源分配

@fastify/accepts-serializer 安全漏洞

@fastify/accepts-serializer是Fastify开源的一个基于Accept头自动选择序列化方式的插件。 @fastify/accepts-serializer 6.0.3及之前版本存在安全漏洞，该漏洞源于缓存序列化选择结果时未设置大小限制或驱逐策略，远程未认证客户端可发送大量不同但匹配的Accept标头变体导致缓存无限增长，最终耗尽Node.js堆并导致进程崩溃。

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