{"id":"CVE-2026-103471","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103471","generatedAt":"2026-10-28T03:30:02.741Z","title":"restbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory.","description":"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 sending the header delimiter, forcing the server to allocate unbounded heap memory until the process is killed.","published":"2026-09-30T18:18:17.000Z","lastModified":"2026-09-30T20:17:31.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-770"],"affected":[],"epss":{"score":0.00551,"percentile":0.45819,"date":"2026-10-26","history":[{"date":"2026-10-01","score":0.00793,"percentile":0.54742}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-30T18:18:17.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-09-30T18:18:17.163Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://github.com/Corvusoft/restbed","source":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/service_impl.cpp#L554","source":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/session.cpp#L200","source":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/issues/558","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/restbed-through-5.0.0-denial-of-service-via-unbounded-header-buffering","source":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/issues/558","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103471","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}