{"id":"CVE-2026-8468","aliases":["EEF-CVE-2026-8468","GHSA-468c-vq7p-gh64"],"url":"https://o3.security/vulnerability/CVE-2026-8468","summary":"Unbounded buffer accumulation in multipart header parsing causes denial of service in plug","details":"Allocation of Resources Without Limits or Throttling vulnerability in plug_project plug allows denial of service via unbounded buffer accumulation in multipart header parsing.\n\n'Elixir.Plug.Conn':read_part_headers/2 in lib/plug/conn.ex does not obey its :length parameter. There is no upper bound on the size of the accumulated buffer. By contrast, the sibling function read_part_body has an explicit byte_size(acc) > length guard that stops accumulation once a limit is reached. No such guard exists in read_part_headers. An unauthenticated remote attacker can exhaust server memory by sending a crafted multipart/form-data request, causing a denial of service.\n\nThis issue affects plug from 1.4.0 before 1.15.4, 1.16.3, 1.17.1, 1.18.2, and 1.19.2.","published":"2026-05-14T10:29:51.062Z","modified":"2026-08-12T03:51:27.740512011Z","cvss":null,"epss":{"score":0.0062,"percentile":0.46821,"asOf":"2026-08-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Hex","name":"plug","fixedVersion":"1.15.4"},{"ecosystem":"Hex","name":"plug","fixedVersion":"1.16.3"},{"ecosystem":"Hex","name":"plug","fixedVersion":"1.17.1"},{"ecosystem":"Hex","name":"plug","fixedVersion":"1.18.2"},{"ecosystem":"Hex","name":"plug","fixedVersion":"1.19.2"}],"fix":{"url":"https://github.com/elixir-plug/plug/commit/2cb7958d33030aa826b0c7404375844d4593d43a","label":"elixir-plug/plug@2cb7958"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-8466.html"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-8468.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-8468"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8468.json"},{"type":"ADVISORY","url":"https://github.com/elixir-plug/plug/security/advisories/GHSA-468c-vq7p-gh64"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8468"},{"type":"FIX","url":"https://github.com/elixir-plug/plug/commit/2cb7958d33030aa826b0c7404375844d4593d43a"},{"type":"FIX","url":"https://github.com/elixir-plug/plug/commit/33858427c7f2737d560a2e40a0c9a9270d77d1d7"},{"type":"FIX","url":"https://github.com/elixir-plug/plug/commit/aa69c5ece99c40ded88b8c6581ecc86664b0b734"},{"type":"FIX","url":"https://github.com/elixir-plug/plug/commit/d5dfffe25e975585227b1b85d247b0d14164bc45"},{"type":"FIX","url":"https://github.com/elixir-plug/plug/commit/df812a1527bae9e941965e897308a2b8bbf83a94"},{"type":"PACKAGE","url":"https://github.com/elixir-plug/plug"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:27.740512011Z"}}