{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48861", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-05-25T20:44:10.697Z", "datePublished": "2026-06-02T14:15:09.015Z", "dateUpdated": "2026-06-02T19:14:00.466Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Mint.HTTP1.Request'"], "packageName": "mint", "packageURL": "pkg:hex/mint", "product": "mint", "programFiles": ["lib/mint/http1/request.ex"], "programRoutines": [{"name": "'Elixir.Mint.HTTP1.Request':encode_request_line/2"}], "repo": "https://github.com/elixir-mint/mint", "vendor": "elixir-mint", "versions": [{"lessThan": "1.9.0", "status": "affected", "version": "0.1.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Mint.HTTP1.Request'"], "packageName": "elixir-mint/mint", "packageURL": "pkg:github/elixir-mint/mint", "product": "mint", "programFiles": ["lib/mint/http1/request.ex"], "programRoutines": [{"name": "'Elixir.Mint.HTTP1.Request':encode_request_line/2"}], "repo": "https://github.com/elixir-mint/mint.git", "vendor": "elixir-mint", "versions": [{"lessThan": "fad091454cbb7449b19edb8e1fee12ca7cf28c3a", "status": "affected", "version": "8db1acff30b6a9433762c18b1e1f891b8c1f74f7", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.9.0", "versionStartIncluding": "0.1.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "Peter Ullrich"}, {"lang": "en", "type": "remediation developer", "value": "Eric Meadows-J\u00f6nsson"}, {"lang": "en", "type": "analyst", "value": "Jonatan M\u00e4nnchen / EEF"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in elixir-mint Mint allows HTTP Request Splitting and HTTP Request Smuggling.<p>In <tt>lib/mint/http1/request.ex</tt>, the <tt>encode_request_line/2</tt> function splices the caller-supplied <tt>method</tt> and <tt>target</tt> arguments directly into the HTTP/1 request line without any character validation: <tt>[method, ?\\s, target, \" HTTP/1.1\\r\\n\"]</tt>. An application that forwards attacker-controlled input as the HTTP method or target to <tt>'Elixir.Mint.HTTP':request/5</tt> is therefore exposed to request-line CRLF injection: the attacker can terminate the request line early, inject arbitrary headers, and smuggle an entirely separate pipelined HTTP request onto the same TCP connection.</p><p>Mint 1.7.0 introduced <tt>validate_request_target/2</tt>, which rejects CRLF and other control characters in the <tt>target</tt> by default and closes the path/query vector unless the caller opts out via <tt>skip_target_validation: true</tt>. The <tt>method</tt> field remains unvalidated, so the method-based injection is exploitable under the default Mint configuration on all versions.</p><p>This issue affects mint: from 0.1.0 before 1.9.0.</p>"}], "value": "Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in elixir-mint Mint allows HTTP Request Splitting and HTTP Request Smuggling.\n\nIn lib/mint/http1/request.ex, the encode_request_line/2 function splices the caller-supplied method and target arguments directly into the HTTP/1 request line without any character validation: [method, ?\\s, target, \" HTTP/1.1\\r\\n\"]. An application that forwards attacker-controlled input as the HTTP method or target to Mint.HTTP.request/5 is therefore exposed to request-line CRLF injection: the attacker can terminate the request line early, inject arbitrary headers, and smuggle an entirely separate pipelined HTTP request onto the same TCP connection.\n\nMint 1.7.0 introduced validate_request_target/2, which rejects CRLF and other control characters in the target by default and closes the path/query vector unless the caller opts out via skip_target_validation: true. The method field remains unvalidated, so the method-based injection is exploitable under the default Mint configuration on all versions.\n\nThis issue affects mint: from 0.1.0 before 1.9.0."}], "impacts": [{"capecId": "CAPEC-33", "descriptions": [{"lang": "en", "value": "CAPEC-33 HTTP Request Smuggling"}]}, {"capecId": "CAPEC-105", "descriptions": [{"lang": "en", "value": "CAPEC-105 HTTP Request Splitting"}]}], "metrics": [{"cvssV4_0": {"attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "baseScore": 2.1, "baseSeverity": "LOW", "privilegesRequired": "NONE", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-93", "description": "CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-06-02T19:14:00.466Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-2pg6-44cx-c49v"}, {"tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-48861.html"}, {"tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48861"}, {"tags": ["patch"], "url": "https://github.com/elixir-mint/mint/commit/fad091454cbb7449b19edb8e1fee12ca7cf28c3a"}], "source": {"discovery": "EXTERNAL"}, "title": "CRLF injection in HTTP/1 request line via unvalidated method in Mint", "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"references": [{"url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-2pg6-44cx-c49v", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-02T18:11:46.297986Z", "id": "CVE-2026-48861", "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": "2026-06-02T18:12:22.736Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in elixir-mint Mint allows HTTP Request Splitting and HTTP Request Smuggling.\n\nIn lib/mint/http1/request.ex, the encode_request_line/2 function splices the caller-supplied method and target arguments directly into the HTTP/1 request line without any character validation: [method, ?\\s, target, \" HTTP/1.1\\r\\n\"]. An application that forwards attacker-controlled input as the HTTP method or target to Mint.HTTP.request/5 is therefore exposed to request-line CRLF injection: the attacker can terminate the request line early, inject arbitrary headers, and smuggle an entirely separate pipelined HTTP request onto the same TCP connection.\n\nMint 1.7.0 introduced validate_request_target/2, which rejects CRLF and other control characters in the target by default and closes the path/query vector unless the caller opts out via skip_target_validation: true. The method field remains unvalidated, so the method-based injection is exploitable under the default Mint configuration on all versions.\n\nThis issue affects mint: from 0.1.0 before 1.9.0."}], "id": "CVE-2026-48861", "lastModified": "2026-06-02T17:18:19.573", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.1, "baseSeverity": "LOW", "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": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}, "published": "2026-06-02T16:16:44.470", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-48861.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/elixir-mint/mint/commit/fad091454cbb7449b19edb8e1fee12ca7cf28c3a"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-2pg6-44cx-c49v"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48861"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-93"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.1.0,1.9.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8db1acff30b6a9433762c18b1e1f891b8c1f74f7,fad091454cbb7449b19edb8e1fee12ca7cf28c3a)"}}], "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": "[0.1.0,1.9.0)"}}], "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": "[8db1acff30b6a9433762c18b1e1f891b8c1f74f7,fad091454cbb7449b19edb8e1fee12ca7cf28c3a)"}}], "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": "2026-06-02T17:15:19.001108+00:00", "updated": "2026-06-02T17:45:05.869403+00:00", "vendors": ["elixir-mint", "elixir-mint$PRODUCT$mint"], "weaknesses": ["CWE-93"]}