What’s Vulnerable › Vulnerabilities

CVE-2026-72587: Instatic - Cache Poisoning via Unauthenticated Server Island Endpoint

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-10-24
• Weakness: CWE-444

Description

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.

Affected products

• CoreBunch Instatic: through 0.0.14

References

• https://github.com/CoreBunch/Instatic

Get alerted when CVE-2026-72587 or the next vulnerability affects your stack