{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-82729", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-08-31T00:59:08.960Z", "datePublished": "2026-09-04T14:31:20.562Z", "dateUpdated": "2026-09-04T19:33:32.398Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Mint.HTTP1.Parse'", "'Elixir.Mint.HTTP1'"], "packageName": "mint", "packageURL": "pkg:hex/mint", "product": "mint", "programFiles": ["lib/mint/http1/parse.ex", "lib/mint/http1.ex"], "programRoutines": [{"name": "'Elixir.Mint.HTTP1.Parse':chunk_size/1"}, {"name": "'Elixir.Mint.HTTP1':decode_body/5"}], "repo": "https://github.com/elixir-mint/mint", "vendor": "elixir-mint", "versions": [{"lessThan": "1.10.0", "status": "affected", "version": "1.9.3", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Mint.HTTP1.Parse'", "'Elixir.Mint.HTTP1'"], "packageName": "elixir-mint/mint", "packageURL": "pkg:github/elixir-mint/mint", "product": "mint", "programFiles": ["lib/mint/http1/parse.ex", "lib/mint/http1.ex"], "programRoutines": [{"name": "'Elixir.Mint.HTTP1.Parse':chunk_size/1"}, {"name": "'Elixir.Mint.HTTP1':decode_body/5"}], "repo": "https://github.com/elixir-mint/mint", "vendor": "elixir-mint", "versions": [{"lessThan": "bd2a4e7513594997c140cfef9fe0e968712fb588", "status": "affected", "version": "fc7d16538db7e40b56ed489f08683225cb0197fa", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.10.0", "versionStartIncluding": "1.9.3", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "Tr3bor"}, {"lang": "en", "type": "reporter", "value": "Tr3bor"}, {"lang": "en", "type": "remediation developer", "value": "Andrea Leopardi"}, {"lang": "en", "type": "coordinator", "value": "Jonatan M\u00e4nnchen / EEF"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Inefficient Algorithmic Complexity vulnerability in elixir-mint mint allows a remote HTTP server to exhaust CPU on the client host and cause a denial of service.</p>\n<p><code>parse_hex_prefix/2</code> in <code>lib/mint/http1/parse.ex</code> folds each hex digit of a chunked response's chunk-size field into an arbitrary-precision accumulator with <code>acc * 16 + digit</code> and imposes no limit on the digit count. Because the accumulator grows without bound, the multiplication is not constant time and one pass over <code>N</code> digits costs O(N squared). <code>handle_data/2</code> prepends <code>conn.buffer</code> and re-parses from the start on every socket message, so a server that dribbles the digits out in small packets makes the client pay that cost repeatedly. A run of roughly 512,000 hex digits costs over ten seconds of CPU in a single pass, measured on stock defaults. The parser reaches this state after a valid status line and a complete, valid header section, so an intermediary inspecting only headers sees an ordinary 200 response.</p>\n<p>This issue affects mint: from 1.9.3 before 1.10.0.</p>"}, {"base64": false, "type": "text/markdown", "value": "Inefficient Algorithmic Complexity vulnerability in elixir-mint mint allows a remote HTTP server to exhaust CPU on the client host and cause a denial of service.\n\n`parse_hex_prefix/2` in `lib/mint/http1/parse.ex` folds each hex digit of a chunked response's chunk-size field into an arbitrary-precision accumulator with `acc * 16 + digit` and imposes no limit on the digit count. Because the accumulator grows without bound, the multiplication is not constant time and one pass over `N` digits costs O(N squared). `handle_data/2` prepends `conn.buffer` and re-parses from the start on every socket message, so a server that dribbles the digits out in small packets makes the client pay that cost repeatedly. A run of roughly 512,000 hex digits costs over ten seconds of CPU in a single pass, measured on stock defaults. The parser reaches this state after a valid status line and a complete, valid header section, so an intermediary inspecting only headers sees an ordinary 200 response.\n\nThis issue affects mint: from 1.9.3 before 1.10.0."}], "value": "Inefficient Algorithmic Complexity vulnerability in elixir-mint mint allows a remote HTTP server to exhaust CPU on the client host and cause a denial of service.\n\nparse_hex_prefix/2 in lib/mint/http1/parse.ex folds each hex digit of a chunked response's chunk-size field into an arbitrary-precision accumulator with acc * 16 + digit and imposes no limit on the digit count. Because the accumulator grows without bound, the multiplication is not constant time and one pass over N digits costs O(N squared). handle_data/2 prepends conn.buffer and re-parses from the start on every socket message, so a server that dribbles the digits out in small packets makes the client pay that cost repeatedly. A run of roughly 512,000 hex digits costs over ten seconds of CPU in a single pass, measured on stock defaults. The parser reaches this state after a valid status line and a complete, valid header section, so an intermediary inspecting only headers sees an ordinary 200 response.\n\nThis issue affects mint: from 1.9.3 before 1.10.0."}], "impacts": [{"capecId": "CAPEC-130", "descriptions": [{"lang": "en", "value": "CAPEC-130 Excessive Allocation"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 6.3, "baseSeverity": "MEDIUM", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/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", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-407", "description": "CWE-407 Inefficient Algorithmic Complexity", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-09-04T14:31:20.562Z"}, "references": [{"tags": ["related", "vendor-advisory"], "url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-7p8w-j234-7qc8"}, {"tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-82729.html"}, {"tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82729"}, {"tags": ["patch"], "url": "https://github.com/elixir-mint/mint/commit/bd2a4e7513594997c140cfef9fe0e968712fb588"}], "source": {"discovery": "EXTERNAL"}, "title": "Quadratic chunk-size parsing in Mint.HTTP1.Parse allows CPU-exhaustion DoS"}, "adp": [{"references": [{"url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-7p8w-j234-7qc8", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-04T19:33:08.928597Z", "id": "CVE-2026-82729", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-04T19:33:32.398Z"}}]}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Mint.HTTP1.Parse'", "'Elixir.Mint.HTTP1'"], "packageName": "mint", "packageURL": "pkg:hex/mint", "product": "mint", "programFiles": ["lib/mint/http1/parse.ex", "lib/mint/http1.ex"], "programRoutines": [{"name": "'Elixir.Mint.HTTP1.Parse':chunk_size/1"}, {"name": "'Elixir.Mint.HTTP1':decode_body/5"}], "repo": "https://github.com/elixir-mint/mint", "vendor": "elixir-mint", "versions": [{"lessThan": "1.10.0", "status": "affected", "version": "1.9.3", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Mint.HTTP1.Parse'", "'Elixir.Mint.HTTP1'"], "packageName": "elixir-mint/mint", "packageURL": "pkg:github/elixir-mint/mint", "product": "mint", "programFiles": ["lib/mint/http1/parse.ex", "lib/mint/http1.ex"], "programRoutines": [{"name": "'Elixir.Mint.HTTP1.Parse':chunk_size/1"}, {"name": "'Elixir.Mint.HTTP1':decode_body/5"}], "repo": "https://github.com/elixir-mint/mint", "vendor": "elixir-mint", "versions": [{"lessThan": "bd2a4e7513594997c140cfef9fe0e968712fb588", "status": "affected", "version": "fc7d16538db7e40b56ed489f08683225cb0197fa", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Inefficient Algorithmic Complexity vulnerability in elixir-mint mint allows a remote HTTP server to exhaust CPU on the client host and cause a denial of service.\n\nparse_hex_prefix/2 in lib/mint/http1/parse.ex folds each hex digit of a chunked response's chunk-size field into an arbitrary-precision accumulator with acc * 16 + digit and imposes no limit on the digit count. Because the accumulator grows without bound, the multiplication is not constant time and one pass over N digits costs O(N squared). handle_data/2 prepends conn.buffer and re-parses from the start on every socket message, so a server that dribbles the digits out in small packets makes the client pay that cost repeatedly. A run of roughly 512,000 hex digits costs over ten seconds of CPU in a single pass, measured on stock defaults. The parser reaches this state after a valid status line and a complete, valid header section, so an intermediary inspecting only headers sees an ordinary 200 response.\n\nThis issue affects mint: from 1.9.3 before 1.10.0."}], "id": "CVE-2026-82729", "lastModified": "2026-09-04T15:17:36.120", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}, "published": "2026-09-04T15:17:36.120", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-82729.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/elixir-mint/mint/commit/bd2a4e7513594997c140cfef9fe0e968712fb588"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-7p8w-j234-7qc8"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82729"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-407"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.9.3,1.10.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc7d16538db7e40b56ed489f08683225cb0197fa,bd2a4e7513594997c140cfef9fe0e968712fb588)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "mint", "vendor": "elixir-mint"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.9.3,1.10.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "mint", "source": "cna", "vendor": "elixir-mint"}, "product": "mint", "vendor": "elixir-mint"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc7d16538db7e40b56ed489f08683225cb0197fa,bd2a4e7513594997c140cfef9fe0e968712fb588)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "mint", "source": "cna", "vendor": "elixir-mint"}, "product": "mint", "vendor": "elixir-mint"}], "created": "2026-09-04T15:30:06.481794+00:00", "updated": "2026-09-04T15:45:04.709824+00:00", "vendors": ["elixir-mint", "elixir-mint$PRODUCT$mint"]}