Vulnerability Description
@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 Score
HIGH
Related Weaknesses (CWE)
References
- https://cna.openjsf.org/security-advisories.html
- https://github.com/fastify/fastify-accepts-serializer/security/advisories/GHSA-q
FAQ
What is CVE-2026-7768?
CVE-2026-7768 is a vulnerability with a CVSS score of 7.5 (HIGH). @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...
How severe is CVE-2026-7768?
CVE-2026-7768 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-7768?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.