{"id":"CVE-2026-77622","revision":"6eae483da2a84d578a0f7ba7ebd00135","records":[{"revision":"6eae483da2a84d578a0f7ba7ebd00135","observedAt":"2026-11-05T21:36:21.359+00:00","statement":{"source":"cve-program","id":"CVE-2026-77622","aliases":[],"title":"Sliver: Unauthenticated Memory Exhaustion Denial of Service in Sliver HTTP(S) Listener PNG Decoder","description":"Sliver is a command and control framework. Prior to 1.7.6, an HTTP(S) listener using the PNG encoder accepts attacker-controlled PNG dimensions without an effective decoded-size or pixel limit in util/encoders/images.go, while the listener nonce space implemented in server/encoders/encoders.go is small enough to search remotely. An unauthenticated attacker who identifies a valid nonce can submit a highly compressed image to PNGEncoder.Decode, where it expands during png.Decode, exhausting server memory and causing a complete loss of availability. This vulnerability is fixed in 1.7.6.","state":0,"publishedAt":"2026-11-05T20:52:39.075+00:00","modifiedAt":"2026-11-05T20:52:39.075+00:00","affected":[{"ecosystem":"Vendor product","name":"sliver","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"BishopFox\",\n                    \"product\": \"sliver\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.7.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.2,"severity":"HIGH"}],"references":["https://github.com/BishopFox/sliver/security/advisories/GHSA-663m-7x7m-g4fw","https://github.com/BishopFox/sliver/commit/80273462bd8b2a3cd724d2d6d0301a0cabfa977d","https://github.com/BishopFox/sliver/releases/tag/v1.7.6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-77622","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-77622","identifiers":["CVE-2026-77622"]},"retained":false,"historicalAffected":[]}],"coverage":[]}