CVE-2026-44576
Next.js is a React framework for building full-stack web applications. From 14.2.0 to before 15.5.16 and 16.2.5, applications using React Server Components can be vulnerable to cache poisoning when shared caches do not correctly partition response variants. Under affected conditions, an attacker can cause an RSC response to be served from the original URL and poison shared cache entries so later visitors receive component payloads instead of the expected HTML. This vulnerability is fixed in 15.5.16 and 16.2.5.
- CVSS 3.1
- 5.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 21% of CVEs (scores of 2026-10-25)
- CWE
- CWE-436
- Published
- Modified
- Record from
- the NVD, synced
Affected
- vercel:next.js
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wfc6-r584-vfw7 | npm | next | >=14.2.0 <15.5.16 | 15.5.16 |
| GHSA-wfc6-r584-vfw7 | npm | next | >=16.0.0 <16.2.5 | 16.2.5 |