{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"gpac/gpac","product":"gpac","source":"CNA: VulnCheck","vendor":"gpac","versions":[{"lessThanOrEqual":"26.07.0","status":"affected","version":"0","versionType":"custom"}]}],"cveId":"CVE-2026-128240","cwes":["CWE-416"],"description":"GPAC through 26.07.0 contains a use-after-free vulnerability in gf_sg_proto_del() in src/scenegraph/vrml_proto.c because gf_sg_reset() frees unregistered prototypes still referenced by scene commands. Attackers can supply a crafted XMT/BT scene declaring prototypes via commands, processed by MP4Box -chap, to trigger freed memory access and crash the process.","epss":null,"exploits":[{"kind":"exploit","source":"CNA: VulnCheck","url":"https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/223/223_gf_sg_proto_del_scenegraph_vrml_proto_c.xmt"}],"kev":null,"metrics":[{"score":6.8,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":5.5,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},{"score":6.8,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":5.5,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794565091963,"publishedAt":1794562426903,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/gpac/gpac/issues/4031"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/gpac/gpac/commit/a2e5c62c213b5329a4572fe8e7c333e1ca26d028"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/gpac/gpac/blob/v26.07.0/src/scenegraph/vrml_proto.c#L103-L111"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/gpac/gpac/blob/v26.07.0/src/scenegraph/base_scenegraph.c#L537-L542"},{"source":"CNA: VulnCheck","tags":["exploit"],"url":"https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/223/223_gf_sg_proto_del_scenegraph_vrml_proto_c.xmt"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/gpac/gpac"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/gpac-through-26.07.0-use-after-free-in-gf-sg-proto-del-during-scene-teardown"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gpac/gpac"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gpac/gpac/blob/v26.07.0/src/scenegraph/base_scenegraph.c#L537-L542"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gpac/gpac/blob/v26.07.0/src/scenegraph/vrml_proto.c#L103-L111"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gpac/gpac/commit/a2e5c62c213b5329a4572fe8e7c333e1ca26d028"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gpac/gpac/issues/4031"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/223/223_gf_sg_proto_del_scenegraph_vrml_proto_c.xmt"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/gpac-through-26.07.0-use-after-free-in-gf-sg-proto-del-during-scene-teardown"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/gpac/gpac/commit/a2e5c62c213b5329a4572fe8e7c333e1ca26d028"}],"revision":"1bcf0b320600fe7e2e4077970493084b23cf7699fbd90111e72973bfb2ce5fd2","sources":[{"modifiedAt":1794562426903,"name":"CNA: VulnCheck","retrievedAt":1794564852749,"url":"https://www.cve.org/CVERecord?id=CVE-2026-128240"},{"modifiedAt":1794565091963,"name":"NVD","retrievedAt":1794572256263,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128240"}],"ssvc":null,"status":"published","title":"GPAC through 26.07.0 Use-After-Free in gf_sg_proto_del During Scene Teardown","updatedAt":1794572256263}