{"id":"CVE-2026-116543","title":"Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write via SBI Multipart Parser","summary":"Open5GS 1.3.0 through 2.8.0 contains a heap out-of-bounds write vulnerability in parse_multipart() that allows unauthenticated attackers to corrupt memory by supplying an empty multipart boundary. Attackers can send a single crafted mult…","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","cvssSource":"cna","cwe":["CWE-787"],"vendor":"open5gs","product":"open5gs","affected":["open5gs >= 1.3.0 <= 2.8.0"],"published":"2026-10-26","updated":"2026-10-26","sourceUpdated":"2026-10-26T14:59:42.212Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116543","references":[{"url":"https://github.com/open5gs/open5gs/security/advisories/GHSA-25v2-v588-jq8g","label":"GitHub Security Advisory (GHSA-25v2-v588-jq8g)"},{"url":"https://github.com/open5gs/open5gs/commit/6820c2743b5b5e126e3755d2f92dae2b236732df","label":"Patch Commit"},{"url":"https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/message.c#L3372"},{"url":"https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/contrib/multipart_parser.c#L260"},{"url":"https://github.com/open5gs/open5gs"},{"url":"https://www.vulncheck.com/advisories/open5gs-1.3.0-through-2.8.0-heap-out-of-bounds-write-via-sbi-multipart-parser","label":"VulnCheck Advisory: Open5GS 1.3.0 through 2.8.0 Heap Out-of-Bounds Write via SBI Multipart Parser"}],"tags":["cve.org"],"ingestedAt":"2026-10-26T15:29:30.500Z","slug":"CVE-2026-116543","body":"## Overview\n\nOpen5GS 1.3.0 through 2.8.0 contains a heap out-of-bounds write vulnerability in parse_multipart() that allows unauthenticated attackers to corrupt memory by supplying an empty multipart boundary. Attackers can send a single crafted multipart/related request to the SBI interface of any network function, overflowing the lookbehind buffer and crashing it.\n\n## Affected\n\n- `open5gs >= 1.3.0 <= 2.8.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}