{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-48596",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-05-22T09:36:56.834Z",
        "datePublished": "2026-06-02T19:09:31.615Z",
        "dateUpdated": "2026-09-24T20:53:10.649Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Tesla.Multipart'"
                    ],
                    "packageName": "tesla",
                    "packageURL": "pkg:hex/tesla",
                    "product": "tesla",
                    "programFiles": [
                        "lib/tesla/multipart.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Tesla.Multipart':add_content_type_param/2"
                        },
                        {
                            "name": "'Elixir.Tesla.Multipart':headers/1"
                        }
                    ],
                    "repo": "https://github.com/elixir-tesla/tesla",
                    "vendor": "elixir-tesla",
                    "versions": [
                        {
                            "lessThan": "1.18.3",
                            "status": "affected",
                            "version": "0.8.0",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Tesla.Multipart'"
                    ],
                    "packageName": "elixir-tesla/tesla",
                    "packageURL": "pkg:github/elixir-tesla/tesla",
                    "product": "tesla",
                    "programFiles": [
                        "lib/tesla/multipart.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Tesla.Multipart':add_content_type_param/2"
                        },
                        {
                            "name": "'Elixir.Tesla.Multipart':headers/1"
                        }
                    ],
                    "repo": "https://github.com/elixir-tesla/tesla",
                    "vendor": "elixir-tesla",
                    "versions": [
                        {
                            "lessThan": "23601edac5d22ba9407b427967b5bdbda201aec2",
                            "status": "affected",
                            "version": "6ebfdb9abe9c6f119408045b933d82462decd351",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>The application must pass untrusted input into <code>Tesla.Multipart.add_content_type_param/2</code>.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "The application must pass untrusted input into `Tesla.Multipart.add_content_type_param/2`."
                        }
                    ],
                    "value": "The application must pass untrusted input into Tesla.Multipart.add_content_type_param/2."
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "1.18.3",
                                    "versionStartIncluding": "0.8.0",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "OR"
                        }
                    ],
                    "operator": "AND"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Yordis Prieto"
                },
                {
                    "lang": "en",
                    "type": "analyst",
                    "value": "Jonatan Männchen / EEF"
                }
            ],
            "datePublic": "2026-06-02T19:09:31.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') vulnerability in elixir-tesla tesla allows HTTP header injection via <code>Tesla.Multipart.add_content_type_param/2</code>.</p>\n<p><code>Tesla.Multipart.add_content_type_param/2</code> appends caller-supplied strings to the multipart <code>content_type_params</code> list without validating for CR (<code>\\r</code>) or LF (<code>\\n</code>) characters. <code>Tesla.Multipart.headers/1</code> then joins these params verbatim with <code>\"; \"</code> to construct the outgoing <code>Content-Type</code> header value. A param containing <code>\\r\\n</code> splits the header line, allowing arbitrary headers to be injected into the outbound HTTP request. Any application that forwards untrusted input (such as a user-supplied charset or parameter string) into <code>add_content_type_param/2</code> is affected.</p>\n<p>This issue affects tesla: from 0.8.0 before 1.18.3.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') vulnerability in elixir-tesla tesla allows HTTP header injection via `Tesla.Multipart.add_content_type_param/2`.\n\n`Tesla.Multipart.add_content_type_param/2` appends caller-supplied strings to the multipart `content_type_params` list without validating for CR (`\\r`) or LF (`\\n`) characters. `Tesla.Multipart.headers/1` then joins these params verbatim with `\"; \"` to construct the outgoing `Content-Type` header value. A param containing `\\r\\n` splits the header line, allowing arbitrary headers to be injected into the outbound HTTP request. Any application that forwards untrusted input (such as a user-supplied charset or parameter string) into `add_content_type_param/2` is affected.\n\nThis issue affects tesla: from 0.8.0 before 1.18.3."
                        }
                    ],
                    "value": "Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') vulnerability in elixir-tesla tesla allows HTTP header injection via Tesla.Multipart.add_content_type_param/2.\n\nTesla.Multipart.add_content_type_param/2 appends caller-supplied strings to the multipart content_type_params list without validating for CR (\\r) or LF (\\n) characters. Tesla.Multipart.headers/1 then joins these params verbatim with \"; \" to construct the outgoing Content-Type header value. A param containing \\r\\n splits the header line, allowing arbitrary headers to be injected into the outbound HTTP request. Any application that forwards untrusted input (such as a user-supplied charset or parameter string) into add_content_type_param/2 is affected.\n\nThis issue affects tesla: from 0.8.0 before 1.18.3."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-105",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-105 HTTP Request Splitting"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "attackVector": "LOCAL",
                        "baseScore": 2.1,
                        "baseSeverity": "LOW",
                        "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:N/VA:N/SC:N/SI:L/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-113",
                            "description": "CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
                "shortName": "EEF",
                "dateUpdated": "2026-09-24T20:53:10.649Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w"
                },
                {
                    "name": "EEF CNA record for CVE-2026-48596",
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-48596.html"
                },
                {
                    "name": "OSV record EEF-CVE-2026-48596",
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48596"
                },
                {
                    "name": "Introducing commit 6ebfdb9 in elixir-tesla/tesla",
                    "tags": [
                        "related"
                    ],
                    "url": "https://github.com/elixir-tesla/tesla/commit/6ebfdb9abe9c6f119408045b933d82462decd351"
                },
                {
                    "name": "Fix commit 23601ed in elixir-tesla/tesla",
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/elixir-tesla/tesla/commit/23601edac5d22ba9407b427967b5bdbda201aec2"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "CRLF injection in Tesla.Multipart.add_content_type_param/2 allows HTTP header injection",
            "workarounds": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>Validate content-type parameter strings before passing them to <code>Tesla.Multipart.add_content_type_param/2</code>, rejecting any value that contains <code>\\r</code> or <code>\\n</code>.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "Validate content-type parameter strings before passing them to `Tesla.Multipart.add_content_type_param/2`, rejecting any value that contains `\\r` or `\\n`."
                        }
                    ],
                    "value": "Validate content-type parameter strings before passing them to Tesla.Multipart.add_content_type_param/2, rejecting any value that contains \\r or \\n."
                }
            ]
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w",
                        "tags": [
                            "exploit"
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                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-03T13:01:48.568462Z",
                                "id": "CVE-2026-48596",
                                "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": "2026-06-03T13:01:52.596Z"
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}