CVE-2026-72587CWE-444

CVE-2026-72587

Medium · published August 10, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
23.2
In the wild
Unconfirmed
What it is

A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated remote attacker to poison the shared process-wide render cache by manipulating the u query parameter of the GET /_instatic/hole/<nodeId> server island endpoint.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00315 · 23.2th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2026-08-10T15:17Z
References (1)
https://github.com/CoreBunch/Instatic · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
EPSS history
Timeline
  • 10 AUG 10:41Z
    Instatic - Cache Poisoning via Unauthenticated Server Island Endpoint
    cvelistv5