{"id":"CVE-2026-82820","aliases":["DEBIAN-CVE-2026-82820","EUVD-2026-68721","GHSA-83mv-5j75-x432","UBUNTU-CVE-2026-82820"],"status":"published","title":"FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow","description":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00628,"percentile":0.50582,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119","CWE-122"],"published":"2026-08-31T18:30:08Z","modified":"2026-10-28T11:18:41Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.1-1","1.2.2-1","1.2.2-2","1.2.2-2~exp1"]},{"source":"osv","ecosystem":"Debian:13","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.2-1","1.2.2-2","1.2.2-2~exp1"]},{"source":"osv","ecosystem":"Debian:14","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.2-1","1.2.2-2","1.2.2-2~exp1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.2-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.1-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.1-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.1-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.1-1","1.2.1-1build1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.2-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"flvmeta","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.2-1","1.2.2-1build1","1.2.2-2"]}],"references":[{"url":"https://vuldb.com/vuln/397243","tags":["vdb-entry","technical-description","advisory","report"]},{"url":"https://vuldb.com/vuln/397243/cti","tags":["signature","permissions-required","report"]},{"url":"https://vuldb.com/cve/CVE-2026-82820","tags":["third-party-advisory","advisory","report"]},{"url":"https://vuldb.com/submit/876596","tags":["third-party-advisory","advisory","report"]},{"url":"https://github.com/noirotm/flvmeta/issues/27","tags":["issue-tracking","report"]},{"url":"https://github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflow","tags":["exploit","evidence","report"]},{"url":"https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e","tags":["patch","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82820","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-83mv-5j75-x432"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82820.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-82820","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-82820","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-82820","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-82820","title":"FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow","description":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"","status":"published","published":"2026-08-31T18:30:08.737Z","modified":"2026-09-01T18:10:42.105Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium","assessor":"cna"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C","assessor":"cna"}],"cwes":["CWE-122","CWE-119"],"updated_at":"2026-11-02T13:40:46.161838Z"}],"euvd":[{"id":"EUVD-2026-68721","description":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"","status":"published","published":"2026-08-31T18:30:08Z","modified":"2026-09-01T18:10:42Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium"}],"updated_at":"2026-11-02T18:01:17.32054Z"}],"ghsa":[{"id":"GHSA-83mv-5j75-x432","title":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the...","description":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"","status":"published","published":"2026-08-31T21:32:10Z","modified":"2026-08-31T21:32:20Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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","level":"low"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:11:11.962153Z"}],"nvd":[{"id":"CVE-2026-82820","description":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"","status":"published","published":"2026-08-31T19:17:23.137Z","modified":"2026-09-01T19:17:29.193Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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","level":"low","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"secondary"}],"cwes":["CWE-119","CWE-122"],"updated_at":"2026-11-02T14:12:42.691315Z"}],"osv":[{"id":"CVE-2026-82820","title":"FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow","description":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"","status":"published","published":"2026-08-31T18:30:08.737Z","modified":"2026-10-28T11:18:41.898463218Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"low"}],"cwes":["CWE-119","CWE-122"],"updated_at":"2026-11-02T15:45:18.482949Z"},{"id":"DEBIAN-CVE-2026-82820","description":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"","status":"published","published":"2026-08-31T19:17:23.137Z","modified":"2026-10-01T03:03:43.106834535Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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","level":"low"}],"updated_at":"2026-11-02T15:46:04.577397Z"},{"id":"UBUNTU-CVE-2026-82820","description":"A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"","status":"published","published":"2026-08-31T19:17:00Z","modified":"2026-10-17T13:01:12.285183852Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"medium"},{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"low"}],"updated_at":"2026-11-02T16:57:22.213888Z"}]}}