CVE-2026-22031
high
CVSS v3
8.8
CVSS v4 NEW
—
VIR risk
8.8
Description
Fastify Middie Middleware Path Bypass
Predictions
Exploit likelihood
92%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | @fastify/middie | <9.1.0 | 9.1.0 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| fastify | fastify\/middie | {"endExcluding":"9.1.0"} | 9.1.0 |
References
- https://github.com/fastify/middie/commit/d44cd56eb724490babf7b452fdbbdd37ea2effba
- https://github.com/fastify/middie/pull/245
- https://github.com/fastify/middie/releases/tag/v9.1.0
- https://github.com/fastify/middie/security/advisories/GHSA-cxrg-g7r8-w69p
- https://nvd.nist.gov/vuln/detail/CVE-2026-22031
- https://github.com/fastify/middie
CWEs
CWE-177
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.