CVE-2026-3784

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"affected"}, {"version": "7.85.0", "status": "affected"}, {"version": "7.84.0", "status": "affected"}, {"version": "7.83.1", "status": "affected"}, {"version": "7.83.0", "status": "affected"}, {"version": "7.82.0", "status": "affected"}, {"version": "7.81.0", "status": "affected"}, {"version": "7.80.0", "status": "affected"}, {"version": "7.79.1", "status": "affected"}, {"version": "7.79.0", "status": "affected"}, {"version": "7.78.0", "status": "affected"}, {"version": "7.77.0", "status": "affected"}, {"version": "7.76.1", "status": "affected"}, {"version": "7.76.0", "status": "affected"}, {"version": "7.75.0", "status": "affected"}, {"version": "7.74.0", "status": "affected"}, {"version": "7.73.0", "status": "affected"}, {"version": "7.72.0", "status": "affected"}, {"version": "7.71.1", "status": "affected"}, {"version": "7.71.0", "status": "affected"}, {"version": "7.70.0", "status": "affected"}, {"version": "7.69.1", "status": "affected"}, {"version": "7.69.0", "status": 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"version": "7.9.2"}, {"status": "affected", "version": "7.9.1"}, {"status": "affected", "version": "7.9"}, {"status": "affected", "version": "7.8.1"}, {"status": "affected", "version": "7.8"}, {"status": "affected", "version": "7.7.3"}, {"status": "affected", "version": "7.7.2"}, {"status": "affected", "version": "7.7.1"}, {"status": "affected", "version": "7.7"}]}], "source": "2499f714-1537-4658-8207-48ae4bb9eae9"}, {"affectedData": [{"defaultStatus": "unknown", "product": "RUGGEDCOM RST2428P", "vendor": "Siemens", "versions": [{"lessThan": "V4.0", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*", "matchCriteriaId": "94E54714-769C-4910-9044-7BFF8F9F94F0", "versionEndExcluding": "8.18.0", "versionStartIncluding": "7.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a\nserver, even if the new request uses different credentials for the HTTP proxy.\nThe proper behavior is to create or use a separate connection."}, {"lang": "es", "value": "curl reutilizar\u00eda err\u00f3neamente una conexi\u00f3n proxy HTTP existente haciendo CONNECT a un servidor, incluso si la nueva solicitud utiliza credenciales diferentes para el proxy HTTP. El comportamiento adecuado es crear o usar una conexi\u00f3n separada."}], "id": "CVE-2026-3784", "lastModified": "2026-09-15T07:16:27.963", "metrics": {"cvssMetricV31": [{"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3784", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-11T15:48:38.785522Z", "version": "2.0.3"}}]}, "published": "2026-03-11T11:16:00.437", "references": [{"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "tags": ["Patch", "Vendor Advisory"], "url": "https://curl.se/docs/CVE-2026-3784.html"}, {"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "tags": ["Vendor Advisory"], "url": "https://curl.se/docs/CVE-2026-3784.json"}, {"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://hackerone.com/reports/3584903"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/03/11/3"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-253495.html"}], "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-305"}], "source": "2499f714-1537-4658-8207-48ae4bb9eae9", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-305"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "curl: curl: Unauthorized access due to improper HTTP proxy connection reuse", "id": "2446449", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446449"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-305", "details": ["A flaw was found in curl. This vulnerability allows curl to wrongly reuse an existing HTTP proxy connection when performing a CONNECT request to a server, even if the new request uses different authentication credentials for the HTTP proxy. This improper connection reuse could lead to an attacker gaining unauthorized access to resources or information intended for a different user."], "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-2026-3784", "package_state": [{"cpe": "cpe:/a:redhat:confidential_compute_attestation:1", "fix_state": "Fix deferred", "package_name": "build-of-trustee/trustee-rhel9", "product_name": "Confidential Compute Attestation"}, {"cpe": "cpe:/a:redhat:confidential_compute_attestation:1", "fix_state": "Fix deferred", "package_name": "confidential-compute-attestation-tech-preview/trustee-rhel9", "product_name": "Confidential Compute Attestation"}, {"cpe": "cpe:/a:redhat:confidential_compute_attestation:1", "fix_state": "Fix deferred", "package_name": "openshift-sandboxed-containers/osc-operator-bundle", "product_name": "Confidential Compute Attestation"}, {"cpe": "cpe:/a:redhat:confidential_compute_attestation:1", "fix_state": "Fix deferred", "package_name": "openshift-sandboxed-containers/osc-podvm-builder-rhel9", "product_name": "Confidential Compute Attestation"}, {"cpe": "cpe:/a:redhat:confidential_compute_attestation:1", "fix_state": "Fix deferred", "package_name": "openshift-sandboxed-containers/osc-podvm-payload-rhel9", "product_name": "Confidential Compute Attestation"}, {"cpe": "cpe:/a:redhat:confidential_compute_attestation:1", "fix_state": "Fix deferred", "package_name": "openshift-sandboxed-containers/osc-rhel9-operator", "product_name": "Confidential Compute Attestation"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/cluster-logging-operator-bundle", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/cluster-logging-rhel9-operator", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/eventrouter-rhel9", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/fluentd-rhel9", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/log-file-metric-exporter-rhel9", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/logging-view-plugin-rhel9", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/vector-rhel9", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "rust", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "s390utils", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "snphost", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "trustee", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "trustee-guest-components", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "rust", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "snphost", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "trustee-guest-components", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rust", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Fix deferred", "package_name": "curl", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/recert-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Fix deferred", "package_name": "devspaces/code-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:trusted_profile_analyzer:2", "fix_state": "Fix deferred", "package_name": "rhtpa/rhtpa-trustification-service-rhel9", "product_name": "Red Hat Trusted Profile Analyzer"}], "public_date": "2026-03-11T10:09:21Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-3784\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-3784\nhttp://www.openwall.com/lists/oss-security/2026/03/11/3\nhttps://curl.se/docs/CVE-2026-3784.html\nhttps://curl.se/docs/CVE-2026-3784.json\nhttps://hackerone.com/reports/3584903"], "threat_severity": "Moderate"}

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credential usage that may indicate misuse."], "summary": {"action": "Patch Immediately", "impact": "Credential leakage via HTTP proxy reuse"}, "threat_synthesis": {"affected_systems": "The vulnerability affects all versions of the curl client using the libcurl library, as indicated by the CPE cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:. No specific version range is provided in the CNA data, implying that any version prior to a fixed release is potentially impacted.", "description_and_impact": "curl improperly reuses an existing HTTP proxy connection that performed a CONNECT operation, even when subsequent requests use different proxy credentials. This results in the proxy authentication data for one context being sent on a connection that should have been isolated, allowing an attacker to unintentionally expose credentials or bypass authentication controls. The weakness is identified as CWE-305, improper handling of credentials.", "risk_and_exploitability": "The severity is scored as a CVSS 6.5 (Medium), with an EPSS score of less than 1\u202f% and the vulnerability is not listed in CISA\u2019s KEV catalog. The likely attack vector is as follows: a skilled attacker that can control or influence the HTTP proxy used by a curl client could cause the client to send authentication credentials intended for a different proxy, resulting in credential leakage or unauthorized access. Exploitation does not appear to require privileged access to the client or server, and successful attacks would compromise confidentiality of proxy credentials and potentially lead to unauthorized data exfiltration."}}}}, "created": "2026-03-12T10:06:03.841818+00:00", "updated": "2026-03-20T14:37:24.803491+00:00", "vendors": ["curl", "curl$PRODUCT$curl"]}