CVE-2026-121727
highKore before 4.3.0 contains an integer underflow vulnerability in HTTP request body handling that allows unauthenticated attackers to bypass http_body_max by se…
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/jorisvink/kore disclosure@vulncheck.com
- https://github.com/jorisvink/kore/blob/4.3.0-rc5/src/http.c#L934 disclosure@vulncheck.com
- https://github.com/jorisvink/kore/commit/1ff3c0f6f7973dc7fc8bf38369790ef2d8079b3b disclosure@vulncheck.com
- https://kore.io/releases/4.3.0 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/kore-before-4.3.0-integer-underflow-memory-exhaustion... disclosure@vulncheck.com