CVE-2026-44576

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 61/100
Published: 2026-05-13 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction Scope Change

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Changed
C: None
I: Low
A: Low

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
vercel next.js 14.2.0 – 15.5.16

Bug Bounty Relevance

61 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

5.4 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L

EPSS — Exploitation Probability

0.29%
Raw Score 0.002950
Percentile 22.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00295
2026-10-28
0.00295

Intelligence Sources

nvd ref →