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Medium 6.8Published Oct 18, 2026

CVE-2026-110024@fastify/jwt vulnerable to missing token expiration when per-call options drop global defaults

Updated under an hour ago ()

Does this affect you?

It affects @fastify/jwt. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

@fastify/jwt is a JWT utility plugin for Fastify. In versions prior to 10.2.5, the top-level sign and verify methods replace the globally configured defaults with the per-call options instead of merging them, so passing any per-call option silently drops every global default that the call does not restate, including temporal protections such as token expiration and maximum accepted token age. A token signed this way carries no expiration claim and never expires, and verification stops enforcing a configured maximum age, so stale or never-expiring tokens are accepted. The route-level decorators for signing and verifying already merge options and are not affected. The issue is fixed in @fastify/jwt 10.2.5, and users should upgrade to 10.2.5 or later.

CVSS
6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE)
CWE-613
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
openjs
NVD analysis
Received
Record last updated
Oct 18, 2026
First seen by InfoSec Signals
Oct 18, 2026

Affected products

Affected products
@fastify/jwt @fastify/jwt
fastify_jwt:fastify_jwt (from the name)
before 10.2.5; 10.2.5 not affected
CNA record

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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