{"id":"CVE-2026-7768","summary":"@fastify/accepts-serializer vulnerable to Denial of Service via Unbounded Accept Header Cache Growth","details":"@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 \u003c= 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.","aliases":["GHSA-qxhc-wx3p-2wmg"],"modified":"2026-07-15T01:49:02.867525477Z","published":"2026-05-04T19:14:36.828Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7768.json","cna_assigner":"openjs","cwe_ids":["CWE-770"]},"references":[{"type":"ADVISORY","url":"https://cna.openjsf.org/security-advisories.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7768.json"},{"type":"ADVISORY","url":"https://github.com/fastify/fastify-accepts-serializer/security/advisories/GHSA-qxhc-wx3p-2wmg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7768"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/fastify/fastify-accepts-serializer","events":[{"introduced":"0"},{"fixed":"3a45060282c8a1bc935cc5db2e1372a72b1d7428"}],"database_specific":{"cpe":"cpe:2.3:a:fastify:fastify\\/accepts-serializer:*:*:*:*:*:node.js:*:*","extracted_events":[{"introduced":"0"},{"fixed":"6.0.4"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v6.0.3","v6.0.2","v6.0.1","v6.0.0","v5.3.0","v5.2.0","v5.1.0","v5.0.0","v4.0.1","v4.0.0","v3.2.0","v3.1.0","v3.0.1","v2.0.1","v3.0.0","v2.0.0","v1.0.2","v1.0.1","v1.0.0","v0.2.1","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-7768.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}