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Vulnerabilities

Vulnerability · CVE-2026-7768

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy.

Published May 4, 2026 · catalog updated Jun 17, 2026 · @fastify/accepts-serializer cached serializer-selection results

Check if you run it

No confirmed exploitation is on record for CVE-2026-7768. EPSS is 0.49%. Act only if a listed version of @fastify/accepts-serializer cached serializer-selection results is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (@fastify/accepts-serializer cached serializer-selection results).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.49%
Remediation
Version ranges on file
Affected products
cpe fastify/fastify/accepts-serializer · stated fastify/accepts-serializer

@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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe fastify/fastify/accepts-serializerversion unspecified
  • stated fastify/accepts-serializer<= 6.0.3

How to fix CVE-2026-7768

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-7768. EPSS is 0.49%. Act only if a listed version of @fastify/accepts-serializer cached serializer-selection results is installed.

Which versions are affected?

Compare what you have installed with <= 6.0.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-770: Allocation of Resources Without Limits or Throttling. EPSS 0.49%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 4, 2026 · NIST NVD

    Detected

    @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 boun

  2. Jun 17, 2026 · NIST NVD

    Updated

    @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 boun

Sources

  • CVE.orgVulnerability recordCVE-2026-7768

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-7768

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-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 make the cache grow unbounded, eventually ex

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.