CVE-2026-3634

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An attacker controlling the value used to set the Content-Type header can inject a Carriage Return Line Feed (CRLF) sequence due to improper input sanitization in the `soup_message_headers_set_content_type()` function. This vulnerability allows for the injection of arbitrary header-value pairs, potentially leading to HTTP header injection and response splitting attacks."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en libsoup. Un atacante que controla el valor utilizado para establecer el encabezado Content-Type puede inyectar una secuencia de Retorno de Carro y Salto de L\u00ednea (CRLF) debido a una sanitizaci\u00f3n de entrada inadecuada en la funci\u00f3n `soup_message_headers_set_content_type()`. Esta vulnerabilidad permite la inyecci\u00f3n de pares arbitrarios de encabezado-valor, potencialmente conduciendo a la inyecci\u00f3n de encabezados HTTP y ataques de divisi\u00f3n de respuesta."}], "id": "CVE-2026-3634", "lastModified": "2026-11-05T21:18:48.110", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.9, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 0.5, "impactScore": 3.4, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3634", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-17T13:03:02.939035Z", "version": "2.0.3"}}]}, "published": "2026-03-17T10:16:00.860", "references": [{"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-3634"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2445129"}, {"source": "secalert@redhat.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/485"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/485"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-93"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Codean Labs for reporting this issue.", "bugzilla": {"description": "libsoup: libsoup: HTTP header injection and response splitting via CRLF injection in Content-Type header", "id": "2445129", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2445129"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-93", "details": ["No description is available for this CVE."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-3634", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "libsoup3", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-06T05:05:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-3634\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-3634"], "statement": "This MODERATE impact flaw in libsoup allows an attacker to perform HTTP header injection and response splitting. By controlling the `Content-Type` header value, an attacker can inject arbitrary header-value pairs due to improper input sanitization in the `soup_message_headers_set_content_type()` function.", "threat_severity": "Moderate"}

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