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Ubuntu Security NoticesUSN-8650-1

USN-8650-1: Cap'n Proto vulnerabilities

Chanho Kim and Jihyeok Han discovered that Cap'n Proto incorrectly handled negative Content-Length values or excessively large chunk sizes when processing HTTP messages. An attacker could possibly use these issues to cause HTTP messages to be interpreted inconsistently, resulting in HTTP request or response smuggling. (CVE-2026-32239, CVE-2026-32240)

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Scope

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  1. Published by Ubuntu

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Vulnerabilities

CVEs named in this advisory

CVE-2026-32239View CVSS, KEV, EPSS, and threat contextCVE-2026-32240View CVSS, KEV, EPSS, and threat context
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