HIGH 8.7 NVD
CVE-2026-121727
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 sen
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.
References
- https://github.com/jorisvink/kore
- https://github.com/jorisvink/kore/blob/4.3.0-rc5/src/http.c#L934
- https://github.com/jorisvink/kore/commit/1ff3c0f6f7973dc7fc8bf38369790ef2d8079b3b
- https://kore.io/releases/4.3.0
- https://www.vulncheck.com/advisories/kore-before-4.3.0-integer-underflow-memory-exhaustion
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-11-03 via NVD.
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