CVE-2026-45109
high
CVSS v3
7.5
CVSS v4 NEW
โ
VIR risk
7.5
Description
Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up
Predictions
Exploit likelihood
83%
Patch ETA
โ
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 โ if you've already worked around this in production โ publish your fix to the community-verified tier.
โ Propose a mitigation on Community โ Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| vercel | next.js | {"startIncluding":"15.2.0","endExcluding":"15.5.18"} | 15.5.18 |
References
- https://github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6
- https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f
- https://nvd.nist.gov/vuln/detail/CVE-2026-45109
- https://github.com/vercel/next.js
- https://github.com/vercel/next.js/releases/tag/v15.5.18
- https://github.com/vercel/next.js/releases/tag/v16.2.6
- https://github.com/advisories/GHSA-26hh-7cqf-hhc6
CWEs
CWE-288
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.