{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-56814","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-07-10T14:03:11.744626Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-07-10T14:03:28.156Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Plug.Parsers.MULTIPART'"],"packageName":"plug","packageURL":"pkg:hex/plug","product":"plug","programFiles":["lib/plug/parsers/multipart.ex"],"programRoutines":[{"name":"'Elixir.Plug.Parsers.MULTIPART':parse_multipart/2"},{"name":"'Elixir.Plug.Parsers.MULTIPART':parse_multipart_headers/5"},{"name":"'Elixir.Plug.Parsers.MULTIPART':parse_multipart_body/4"},{"name":"'Elixir.Plug.Parsers.MULTIPART':parse_multipart_file/4"}],"repo":"https://github.com/elixir-plug/plug","vendor":"elixir-plug","versions":[{"lessThan":"1.16.6","status":"affected","version":"1.4.0","versionType":"semver"},{"lessThan":"1.17.4","status":"affected","version":"1.17.0","versionType":"semver"},{"lessThan":"1.18.5","status":"affected","version":"1.18.0","versionType":"semver"},{"lessThan":"1.19.5","status":"affected","version":"1.19.0","versionType":"semver"},{"lessThan":"1.20.3","status":"affected","version":"1.20.0","versionType":"semver"}]},{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Plug.Parsers.MULTIPART'"],"packageName":"elixir-plug/plug","packageURL":"pkg:github/elixir-plug/plug","product":"plug","programFiles":["lib/plug/parsers/multipart.ex"],"programRoutines":[{"name":"'Elixir.Plug.Parsers.MULTIPART':parse_multipart/2"},{"name":"'Elixir.Plug.Parsers.MULTIPART':parse_multipart_headers/5"},{"name":"'Elixir.Plug.Parsers.MULTIPART':parse_multipart_body/4"},{"name":"'Elixir.Plug.Parsers.MULTIPART':parse_multipart_file/4"}],"repo":"https://github.com/elixir-plug/plug","vendor":"elixir-plug","versions":[{"changes":[{"at":"981597d3a4271ede64373c7a731702a42c500dd6","status":"unaffected"},{"at":"56edca2ce35fe5589cd581644d8a4493fa5f484e","status":"unaffected"},{"at":"0ee8afcc61466dc5f7a8f048d0632c899165b81f","status":"unaffected"},{"at":"cae36053350e5215a4e0ca33cd130af9c5fc6364","status":"unaffected"},{"at":"f7effaed811c00b5f5bf817936bfd9c5df27b7dc","status":"unaffected"},{"at":"df97d3f17f808a9916a7700a701fb85314559d56","status":"unaffected"}],"lessThan":"*","status":"affected","version":"c52b2f32c90bccd718202bafccb5f95594e30183","versionType":"git"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.16.6","versionStartIncluding":"1.4.0","vulnerable":true},{"criteria":"cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.17.4","versionStartIncluding":"1.17.0","vulnerable":true},{"criteria":"cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.18.5","versionStartIncluding":"1.18.0","vulnerable":true},{"criteria":"cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.19.5","versionStartIncluding":"1.19.0","vulnerable":true},{"criteria":"cpe:2.3:a:elixir-plug:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.20.3","versionStartIncluding":"1.20.0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"AND"}],"credits":[{"lang":"en","type":"finder","value":"Peter Ullrich"},{"lang":"en","type":"analyst","value":"Jonatan Männchen"},{"lang":"en","type":"remediation developer","value":"José Valim"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p><tt>Plug.Parsers.MULTIPART</tt>, the multipart request-body parser used to handle file uploads and multipart forms, does not enforce its <tt>:length</tt> budget against all consumed resources, allowing an unauthenticated remote attacker to cause denial of service. The parser charges the <tt>:length</tt> limit only for part body bytes; part header bytes are never counted, and a part with an empty body costs zero.</p><p>Because every part whose <tt>Content-Disposition</tt> carries a non-empty <tt>filename</tt> creates a fresh temporary file (via <tt>Plug.Upload</tt>) and retains a <tt>Plug.Upload</tt> struct for the duration of the request, an attacker can send a single request composed of many empty-body file parts. Such a request stays well under the configured <tt>:length</tt> limit (8,000,000 bytes by default) while creating one temporary file per part, leading to inode and disk exhaustion and unbounded memory growth. Any application using <tt>Plug.Parsers</tt> with the <tt>:multipart</tt> parser is affected, and no authentication is required, only reachability of a multipart endpoint over HTTP.</p><p>This vulnerability is associated with program files <tt>lib/plug/parsers/multipart.ex</tt> and program routines <tt>Plug.Parsers.MULTIPART.parse_multipart/2</tt>, <tt>Plug.Parsers.MULTIPART.parse_multipart_headers/5</tt>, <tt>Plug.Parsers.MULTIPART.parse_multipart_body/4</tt>, and <tt>Plug.Parsers.MULTIPART.parse_multipart_file/4</tt>.</p><p>This issue affects plug: from 1.4.0 before 1.16.6, from 1.17.0 before 1.17.4, from 1.18.0 before 1.18.5, from 1.19.0 before 1.19.5, and from 1.20.0 before 1.20.3.</p>"}],"value":"Plug.Parsers.MULTIPART, the multipart request-body parser used to handle file uploads and multipart forms, does not enforce its :length budget against all consumed resources, allowing an unauthenticated remote attacker to cause denial of service. The parser charges the :length limit only for part body bytes; part header bytes are never counted, and a part with an empty body costs zero.\n\nBecause every part whose Content-Disposition carries a non-empty filename creates a fresh temporary file (via Plug.Upload) and retains a Plug.Upload struct for the duration of the request, an attacker can send a single request composed of many empty-body file parts. Such a request stays well under the configured :length limit (8,000,000 bytes by default) while creating one temporary file per part, leading to inode and disk exhaustion and unbounded memory growth. Any application using Plug.Parsers with the :multipart parser is affected, and no authentication is required, only reachability of a multipart endpoint over HTTP.\n\nThis vulnerability is associated with program files lib/plug/parsers/multipart.ex and program routines Plug.Parsers.MULTIPART.parse_multipart/2, Plug.Parsers.MULTIPART.parse_multipart_headers/5, Plug.Parsers.MULTIPART.parse_multipart_body/4, and Plug.Parsers.MULTIPART.parse_multipart_file/4.\n\nThis issue affects plug: from 1.4.0 before 1.16.6, from 1.17.0 before 1.17.4, from 1.18.0 before 1.18.5, from 1.19.0 before 1.19.5, and from 1.20.0 before 1.20.3."}],"impacts":[{"capecId":"CAPEC-130","descriptions":[{"lang":"en","value":"CAPEC-130 Excessive Allocation"}]}],"metrics":[{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","description":"CWE-770 Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-07-10T14:41:43.299Z","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","shortName":"EEF"},"references":[{"tags":["vendor-advisory","related"],"url":"https://github.com/elixir-plug/plug/security/advisories/GHSA-95qv-c9g9-rm63"},{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-56814.html"},{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-56814"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/981597d3a4271ede64373c7a731702a42c500dd6"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/56edca2ce35fe5589cd581644d8a4493fa5f484e"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/0ee8afcc61466dc5f7a8f048d0632c899165b81f"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/cae36053350e5215a4e0ca33cd130af9c5fc6364"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/f7effaed811c00b5f5bf817936bfd9c5df27b7dc"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/df97d3f17f808a9916a7700a701fb85314559d56"}],"source":{"discovery":"EXTERNAL"},"title":"Plug: multipart :length limit is not charged for part headers, enabling unbounded temp-file creation (denial of service)","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","assignerShortName":"EEF","cveId":"CVE-2026-56814","datePublished":"2026-07-10T11:14:35.574Z","dateReserved":"2026-06-23T12:29:02.507Z","dateUpdated":"2026-07-10T14:41:43.299Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}