{"items":[{"id":"NVI-00018357","kind":"vulnerability","title":"Plug: Unbounded buffer accumulation in multipart header parsing causes denial of service","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-468c-vq7p-gh64","CVE-2026-8468"],"plain_summary":"GitHub lists this reviewed advisory for plug, plug, plug, plug, plug. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-15ca3718632f787d554beeb644fec0af"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-15ca3718632f787d554beeb644fec0af","url":"https://github.com/advisories/GHSA-468c-vq7p-gh64","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-468c-vq7p-gh64","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T07:02:15.138Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-15ca3718632f787d554beeb644fec0af"],"technology":"plug","known_exclusions":[],"conditions_summary":"### Summary\n\nAn Allocation of Resources Without Limits or Throttling vulnerability in `Plug.Conn.read_part_headers/2` allows an unauthenticated attacker to exhaust server memory by sending a crafted `multipart/form-data` request, causing a denial of service.\n\n### Details\n\n`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`.\n\n### Impact\n\nThis is a denial-of-service vulnerability. Any application using `Plug.Parsers` with the `:multipart` parser, or calling `Plug.Conn.read_part_headers/2` directly, is affected. An unauthenticated remote attacker can trigger the issue by sending crafted HTTP requests with no special privileges.\n\n### References\n\n* Intro Commit: https://github.com/elixir-plug/plug/commit/c52b2f32c90bccd718202bafccb5f95594e30183\n* Patch Commit: https://github.com/elixir-plug/plug/commit/d878b42efea9f12b243dc3e362a2ed048a798203","public_affected_ranges":[">= 1.4.0, < 1.15.4"]},{"certainty":"source_listed","source_ids":["sr-15ca3718632f787d554beeb644fec0af"],"technology":"plug","known_exclusions":[],"conditions_summary":"### Summary\n\nAn Allocation of Resources Without Limits or Throttling vulnerability in `Plug.Conn.read_part_headers/2` allows an unauthenticated attacker to exhaust server memory by sending a crafted `multipart/form-data` request, causing a denial of service.\n\n### Details\n\n`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`.\n\n### Impact\n\nThis is a denial-of-service vulnerability. Any application using `Plug.Parsers` with the `:multipart` parser, or calling `Plug.Conn.read_part_headers/2` directly, is affected. An unauthenticated remote attacker can trigger the issue by sending crafted HTTP requests with no special privileges.\n\n### References\n\n* Intro Commit: https://github.com/elixir-plug/plug/commit/c52b2f32c90bccd718202bafccb5f95594e30183\n* Patch Commit: https://github.com/elixir-plug/plug/commit/d878b42efea9f12b243dc3e362a2ed048a798203","public_affected_ranges":[">= 1.16.0, < 1.16.3"]},{"certainty":"source_listed","source_ids":["sr-15ca3718632f787d554beeb644fec0af"],"technology":"plug","known_exclusions":[],"conditions_summary":"### Summary\n\nAn Allocation of Resources Without Limits or Throttling vulnerability in `Plug.Conn.read_part_headers/2` allows an unauthenticated attacker to exhaust server memory by sending a crafted `multipart/form-data` request, causing a denial of service.\n\n### Details\n\n`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`.\n\n### Impact\n\nThis is a denial-of-service vulnerability. Any application using `Plug.Parsers` with the `:multipart` parser, or calling `Plug.Conn.read_part_headers/2` directly, is affected. An unauthenticated remote attacker can trigger the issue by sending crafted HTTP requests with no special privileges.\n\n### References\n\n* Intro Commit: https://github.com/elixir-plug/plug/commit/c52b2f32c90bccd718202bafccb5f95594e30183\n* Patch Commit: https://github.com/elixir-plug/plug/commit/d878b42efea9f12b243dc3e362a2ed048a798203","public_affected_ranges":[">= 1.17.0, < 1.17.1"]},{"certainty":"source_listed","source_ids":["sr-15ca3718632f787d554beeb644fec0af"],"technology":"plug","known_exclusions":[],"conditions_summary":"### Summary\n\nAn Allocation of Resources Without Limits or Throttling vulnerability in `Plug.Conn.read_part_headers/2` allows an unauthenticated attacker to exhaust server memory by sending a crafted `multipart/form-data` request, causing a denial of service.\n\n### Details\n\n`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`.\n\n### Impact\n\nThis is a denial-of-service vulnerability. Any application using `Plug.Parsers` with the `:multipart` parser, or calling `Plug.Conn.read_part_headers/2` directly, is affected. An unauthenticated remote attacker can trigger the issue by sending crafted HTTP requests with no special privileges.\n\n### References\n\n* Intro Commit: https://github.com/elixir-plug/plug/commit/c52b2f32c90bccd718202bafccb5f95594e30183\n* Patch Commit: https://github.com/elixir-plug/plug/commit/d878b42efea9f12b243dc3e362a2ed048a798203","public_affected_ranges":[">= 1.18.0, < 1.18.2"]},{"certainty":"source_listed","source_ids":["sr-15ca3718632f787d554beeb644fec0af"],"technology":"plug","known_exclusions":[],"conditions_summary":"### Summary\n\nAn Allocation of Resources Without Limits or Throttling vulnerability in `Plug.Conn.read_part_headers/2` allows an unauthenticated attacker to exhaust server memory by sending a crafted `multipart/form-data` request, causing a denial of service.\n\n### Details\n\n`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`.\n\n### Impact\n\nThis is a denial-of-service vulnerability. Any application using `Plug.Parsers` with the `:multipart` parser, or calling `Plug.Conn.read_part_headers/2` directly, is affected. An unauthenticated remote attacker can trigger the issue by sending crafted HTTP requests with no special privileges.\n\n### References\n\n* Intro Commit: https://github.com/elixir-plug/plug/commit/c52b2f32c90bccd718202bafccb5f95594e30183\n* Patch Commit: https://github.com/elixir-plug/plug/commit/d878b42efea9f12b243dc3e362a2ed048a798203","public_affected_ranges":[">= 1.19.0, < 1.19.2"]}],"null_published_at":"2026-11-07T07:07:39.823Z","source_updated_at":"2026-05-20T15:35:14.000Z","source_disclosed_at":"2026-05-20T15:35:13.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-07T07:02:15.138Z"}],"next_cursor":null,"snapshot_revision":"42594"}