What is CVE-2026-7768?

CVE-2026-7768 is a high-severity vulnerability in Fastify Fastify\/accepts-serializer, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-05-04.

How severe is CVE-2026-7768?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Fastify Fastify\/accepts-serializer

CVE-2026-7768

@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 mak…

EPSS: 0.000 (15.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Fastify Fastify\/accepts-serializer
@Fastify/accepts-serializer — versions 0, 6.0.4

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

ce714d77-add3-4f53-aff5-83d477b104bb (Vendor Advisory)
ce714d77-add3-4f53-aff5-83d477b104bb (Vendor Advisory)

Frequently asked questions

What is CVE-2026-7768?: CVE-2026-7768 is a high-severity vulnerability in Fastify Fastify\/accepts-serializer, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-05-04.
How severe is CVE-2026-7768?: High severity. CVSS v3 base score is 7.5 out of 10.