{"id":"CVE-2026-103471","title":"restbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory","summary":"restbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory. Attackers can open TCP connections and stream bytes indefinitely without sendi…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"Corvusoft","product":"restbed","affected":["restbed <= 5.0.0"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T20:17:31.283","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103471","references":[{"url":"https://github.com/Corvusoft/restbed","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/service_impl.cpp#L554","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/session.cpp#L200","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/issues/558","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/restbed-through-5.0.0-denial-of-service-via-unbounded-header-buffering","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/issues/558","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-30T19:17:48.617816Z"},"ingestedAt":"2026-09-30T18:17:24.548Z","slug":"CVE-2026-103471","body":"## Overview\n\nrestbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory. Attackers can open TCP connections and stream bytes indefinitely without sending the header delimiter, forcing the server to allocate unbounded heap memory until the process is killed.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":213961,"id":"CVE-2026-103471","ts":1790799892714,"field":"exploit_available","old":"false","new":"true"}]}