CVE WatchNov 3, 2026

CVE-2026-121727

Kore before 4.3.0 contains an integer underflow vulnerability in HTTP request body handling that allows unauthenticated attackers to bypass

CVSS

7.5

High

EPSS

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KEV

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Exploit Today

0-100

Published: Nov 3, 2026 · Last modified: Nov 3, 2026 · CWE-191

EPSS · 30d

Not enough EPSS history yet.

Technical description

Kore before 4.3.0 contains an integer underflow vulnerability in HTTP request body handling that allows unauthenticated attackers to bypass http_body_max by sending more body bytes than declared. Attackers can send oversized first segments over many concurrent POST, PUT or DELETE connections, wrapping content_length to grow buffers unbounded and exhaust worker memory.

Official references

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