{"api_version":"1","generated_at":"2026-06-03T01:32:19+00:00","cve":"CVE-2026-8468","urls":{"html":"https://cve.report/CVE-2026-8468","api":"https://cve.report/api/cve/CVE-2026-8468.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-8468","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-8468"},"summary":{"title":"Unbounded buffer accumulation in multipart header parsing causes denial of service in plug","description":"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.","state":"PUBLISHED","assigner":"EEF","published_at":"2026-05-14 11:16:18","updated_at":"2026-05-14 17:07:07"},"problem_types":["CWE-770","CWE-770 CWE-770 Allocation of Resources Without Limits or Throttling"],"metrics":[{"version":"4.0","source":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","type":"Secondary","score":"8.2","severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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","data":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"CVSS","score":"8.2","severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","data":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"}}],"references":[{"url":"https://github.com/elixir-plug/plug/commit/33858427c7f2737d560a2e40a0c9a9270d77d1d7","name":"https://github.com/elixir-plug/plug/commit/33858427c7f2737d560a2e40a0c9a9270d77d1d7","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-8468","name":"https://osv.dev/vulnerability/EEF-CVE-2026-8468","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/elixir-plug/plug/commit/df812a1527bae9e941965e897308a2b8bbf83a94","name":"https://github.com/elixir-plug/plug/commit/df812a1527bae9e941965e897308a2b8bbf83a94","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/elixir-plug/plug/security/advisories/GHSA-468c-vq7p-gh64","name":"https://github.com/elixir-plug/plug/security/advisories/GHSA-468c-vq7p-gh64","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://cna.erlef.org/cves/CVE-2026-8466.html","name":"https://cna.erlef.org/cves/CVE-2026-8466.html","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://cna.erlef.org/cves/CVE-2026-8468.html","name":"https://cna.erlef.org/cves/CVE-2026-8468.html","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/elixir-plug/plug/commit/aa69c5ece99c40ded88b8c6581ecc86664b0b734","name":"https://github.com/elixir-plug/plug/commit/aa69c5ece99c40ded88b8c6581ecc86664b0b734","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/elixir-plug/plug/commit/d5dfffe25e975585227b1b85d247b0d14164bc45","name":"https://github.com/elixir-plug/plug/commit/d5dfffe25e975585227b1b85d247b0d14164bc45","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/elixir-plug/plug/commit/2cb7958d33030aa826b0c7404375844d4593d43a","name":"https://github.com/elixir-plug/plug/commit/2cb7958d33030aa826b0c7404375844d4593d43a","refsource":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-8468","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8468","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"elixir-plug","product":"plug","version":"affected 1.4.0 1.15.4 semver","platforms":[]},{"source":"CNA","vendor":"elixir-plug","product":"plug","version":"affected 1.16.0 1.16.3 semver","platforms":[]},{"source":"CNA","vendor":"elixir-plug","product":"plug","version":"affected 1.17.0 1.17.1 semver","platforms":[]},{"source":"CNA","vendor":"elixir-plug","product":"plug","version":"affected 1.18.0 1.18.2 semver","platforms":[]},{"source":"CNA","vendor":"elixir-plug","product":"plug","version":"affected 1.19.0 1.19.2 semver","platforms":[]},{"source":"CNA","vendor":"elixir-plug","product":"plug","version":"affected c52b2f32c90bccd718202bafccb5f95594e30183 * git","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"José Valim","lang":"en"},{"source":"CNA","value":"José Valim","lang":"en"},{"source":"CNA","value":"Jonatan Männchen","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"8468","cve":"CVE-2026-8468","epss":"0.002690000","percentile":"0.503260000","score_date":"2026-05-25","updated_at":"2026-05-26 00:10:59"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["Elixir.Plug.Conn"],"packageName":"plug","packageURL":"pkg:hex/plug","product":"plug","programFiles":["lib/plug/conn.ex"],"programRoutines":[{"name":"'Elixir.Plug.Conn':read_part_headers/2"}],"repo":"https://github.com/elixir-plug/plug","vendor":"elixir-plug","versions":[{"lessThan":"1.15.4","status":"affected","version":"1.4.0","versionType":"semver"},{"lessThan":"1.16.3","status":"affected","version":"1.16.0","versionType":"semver"},{"lessThan":"1.17.1","status":"affected","version":"1.17.0","versionType":"semver"},{"lessThan":"1.18.2","status":"affected","version":"1.18.0","versionType":"semver"},{"lessThan":"1.19.2","status":"affected","version":"1.19.0","versionType":"semver"}]},{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["Elixir.Plug.Conn"],"packageName":"elixir-plug/plug","packageURL":"pkg:github/elixir-plug/plug","product":"plug","programFiles":["lib/plug/conn.ex"],"programRoutines":[{"name":"'Elixir.Plug.Conn':read_part_headers/2"}],"repo":"https://github.com/elixir-plug/plug","vendor":"elixir-plug","versions":[{"changes":[{"at":"2cb7958d33030aa826b0c7404375844d4593d43a","status":"unaffected"},{"at":"aa69c5ece99c40ded88b8c6581ecc86664b0b734","status":"unaffected"},{"at":"d5dfffe25e975585227b1b85d247b0d14164bc45","status":"unaffected"},{"at":"df812a1527bae9e941965e897308a2b8bbf83a94","status":"unaffected"},{"at":"33858427c7f2737d560a2e40a0c9a9270d77d1d7","status":"unaffected"}],"lessThan":"*","status":"affected","version":"c52b2f32c90bccd718202bafccb5f95594e30183","versionType":"git"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>The application must use <tt>Plug.Parsers</tt> with the <tt>:multipart</tt> parser, or otherwise call <tt>Plug.Conn.read_part_headers/2</tt> to process <tt>multipart/form-data</tt> request bodies. Deployments that do not handle multipart uploads are not affected.</p>"}],"value":"The application must use Plug.Parsers with the :multipart parser, or otherwise call Plug.Conn.read_part_headers/2 to process multipart/form-data request bodies. Deployments that do not handle multipart uploads are not affected."}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.15.4","versionStartIncluding":"1.4.0","vulnerable":true},{"criteria":"cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.16.3","versionStartIncluding":"1.16.0","vulnerable":true},{"criteria":"cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.17.1","versionStartIncluding":"1.17.0","vulnerable":true},{"criteria":"cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.18.2","versionStartIncluding":"1.18.0","vulnerable":true},{"criteria":"cpe:2.3:a:plug_project:plug:*:*:*:*:*:*:*:*","versionEndExcluding":"1.19.2","versionStartIncluding":"1.19.0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"AND"}],"credits":[{"lang":"en","type":"finder","value":"José Valim"},{"lang":"en","type":"remediation developer","value":"José Valim"},{"lang":"en","type":"analyst","value":"Jonatan Männchen"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Allocation of Resources Without Limits or Throttling vulnerability in plug_project plug allows denial of service via unbounded buffer accumulation in multipart header parsing.</p><p><tt>'Elixir.Plug.Conn':read_part_headers/2</tt> in <tt>lib/plug/conn.ex</tt> does not obey its <tt>:length</tt> parameter. There is no upper bound on the size of the accumulated buffer. By contrast, the sibling function <tt>read_part_body</tt> has an explicit <tt>byte_size(acc) &gt; length</tt> guard that stops accumulation once a limit is reached. No such guard exists in <tt>read_part_headers</tt>. An unauthenticated remote attacker can exhaust server memory by sending a crafted <tt>multipart/form-data</tt> request, causing a denial of service.</p><p>This issue affects plug from 1.4.0 before 1.15.4, 1.16.3, 1.17.1, 1.18.2, and 1.19.2.</p>"}],"value":"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."}],"impacts":[{"capecId":"CAPEC-130","descriptions":[{"lang":"en","value":"CAPEC-130 Excessive Allocation"}]}],"metrics":[{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","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":"2026-05-14T10:56:21.031Z","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","shortName":"EEF"},"references":[{"tags":["vendor-advisory","related"],"url":"https://github.com/elixir-plug/plug/security/advisories/GHSA-468c-vq7p-gh64"},{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-8468.html"},{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-8468"},{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-8466.html"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/2cb7958d33030aa826b0c7404375844d4593d43a"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/aa69c5ece99c40ded88b8c6581ecc86664b0b734"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/d5dfffe25e975585227b1b85d247b0d14164bc45"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/df812a1527bae9e941965e897308a2b8bbf83a94"},{"tags":["patch"],"url":"https://github.com/elixir-plug/plug/commit/33858427c7f2737d560a2e40a0c9a9270d77d1d7"}],"source":{"discovery":"INTERNAL"},"title":"Unbounded buffer accumulation in multipart header parsing causes denial of service in plug","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","assignerShortName":"EEF","cveId":"CVE-2026-8468","datePublished":"2026-05-14T10:29:51.062Z","dateReserved":"2026-05-13T11:44:42.164Z","dateUpdated":"2026-05-14T10:56:21.031Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-14 11:16:18","lastModifiedDate":"2026-05-14 17:07:07","problem_types":["CWE-770","CWE-770 CWE-770 Allocation of Resources Without Limits or Throttling"],"metrics":{"cvssMetricV40":[{"source":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"8468","Ordinal":"1","Title":"Unbounded buffer accumulation in multipart header parsing causes","CVE":"CVE-2026-8468","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"8468","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Unbounded buffer accumulation in multipart header parsing causes"}]}}}