{"id":"CVE-2026-53423","aliases":["EEF-CVE-2026-53423","GHSA-43hj-fxwj-49qw"],"url":"https://o3.security/vulnerability/CVE-2026-53423","summary":"Unauthenticated denial-of-service via BEAM atom table exhaustion in membrane_mp4_plugin","details":"Allocation of Resources Without Limits or Throttling vulnerability in membraneframework membrane_mp4_plugin allows unauthenticated denial-of-service via BEAM atom table exhaustion.\n\nThe MP4 box header parser converts each 4-byte box name to an atom using String.to_atom/1 without validation. 'Elixir.Membrane.MP4.Container.Header':parse_box_name/1 in lib/membrane_mp4/container/header.ex interns every box name encountered while 'Elixir.Membrane.MP4.Container.Header':parse/1 walks the input. BEAM atoms are never garbage-collected, so each unique attacker-controlled 4-byte name is a permanent allocation. A crafted MP4 of approximately 8 MB containing roughly 1.1 million boxes with distinct non-standard names exhausts the atom table (default ceiling around 1,048,576 atoms), aborting the entire BEAM node and taking down all applications running on it.\n\nThis issue affects membrane_mp4_plugin from 0.3.0 before 0.36.7.","published":"2026-06-11T10:44:51.528Z","modified":"2026-08-12T03:51:27.053881894Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Hex","name":"membrane_mp4_plugin","fixedVersion":"0.36.7"}],"fix":{"url":"https://github.com/membraneframework/membrane_mp4_plugin/commit/56373d1ddc86968e55fbde795c14eeba24357b57","label":"membraneframework/membrane_mp4_plugin@56373d1"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-53423.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-53423"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53423.json"},{"type":"ADVISORY","url":"https://github.com/membraneframework/membrane_mp4_plugin/security/advisories/GHSA-43hj-fxwj-49qw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53423"},{"type":"FIX","url":"https://github.com/membraneframework/membrane_mp4_plugin/commit/56373d1ddc86968e55fbde795c14eeba24357b57"},{"type":"PACKAGE","url":"https://github.com/membraneframework/membrane_mp4_plugin"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:27.053881894Z"}}