{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-92387", "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9", "state": "PUBLISHED", "assignerShortName": "curl", "dateReserved": "2026-09-16T08:12:45.613Z", "datePublished": "2026-10-20T20:19:14.672Z", "dateUpdated": "2026-10-20T20:19:14.672Z"}, "containers": {"cna": {"title": "never-ending loop via server response omission", "descriptions": [{"lang": "en", "value": "By permanently omitting the final control-response line, a malicious FTP,\nIMAP, POP3, or SMTP server can exploit libcurl and completely bypass its\nconfigured transfer timeout mechanism, indefinitely blocking all concurrent\ntransfers bound to the same multi-handle."}], "providerMetadata": {"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9", "shortName": "curl", "dateUpdated": "2026-10-20T20:19:14.672Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')"}]}], "affected": [{"vendor": "curl", "product": "curl", "versions": [{"version": "8.22.0", "status": "affected", "lessThanOrEqual": "8.22.0", "versionType": "semver"}, {"version": "8.21.0", "status": "affected", "lessThanOrEqual": "8.21.0", "versionType": "semver"}, {"version": "8.20.0", "status": "affected", "lessThanOrEqual": "8.20.0", "versionType": "semver"}, {"version": "8.19.0", "status": "affected", "lessThanOrEqual": "8.19.0", "versionType": "semver"}, {"version": "8.18.0", "status": "affected", "lessThanOrEqual": "8.18.0", "versionType": "semver"}, {"version": "8.17.0", "status": "affected", "lessThanOrEqual": "8.17.0", "versionType": "semver"}, {"version": "8.16.0", "status": "affected", "lessThanOrEqual": "8.16.0", "versionType": "semver"}, {"version": "8.15.0", "status": "affected", "lessThanOrEqual": "8.15.0", "versionType": "semver"}, {"version": "8.14.1", "status": "affected", "lessThanOrEqual": "8.14.1", "versionType": "semver"}, {"version": "8.14.0", "status": "affected", "lessThanOrEqual": "8.14.0", "versionType": "semver"}, {"version": "8.13.0", "status": "affected", "lessThanOrEqual": "8.13.0", "versionType": "semver"}, {"version": "8.12.1", "status": "affected", "lessThanOrEqual": "8.12.1", "versionType": "semver"}, {"version": "8.12.0", "status": "affected", "lessThanOrEqual": "8.12.0", "versionType": "semver"}, {"version": "8.11.1", "status": "affected", "lessThanOrEqual": "8.11.1", "versionType": "semver"}, {"version": "8.11.0", "status": "affected", "lessThanOrEqual": "8.11.0", "versionType": "semver"}, {"version": "8.10.1", "status": "affected", "lessThanOrEqual": "8.10.1", "versionType": "semver"}, {"version": "8.10.0", "status": "affected", "lessThanOrEqual": "8.10.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://curl.se/docs/CVE-2026-92387.json", "name": "json"}, {"url": "https://curl.se/docs/CVE-2026-92387.html", "name": "www"}, {"url": "https://hackerone.com/reports/4022003", "name": "issue"}], "credits": [{"lang": "en", "value": "Joshua Rogers (Aisle Research)", "type": "finder"}, {"lang": "en", "value": "Daniel Stenberg", "type": "remediation developer"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "curl", "vendor": "curl", "versions": [{"lessThanOrEqual": "8.22.0", "status": "affected", "version": "8.22.0", "versionType": "semver"}, {"lessThanOrEqual": "8.21.0", "status": "affected", "version": "8.21.0", "versionType": "semver"}, {"lessThanOrEqual": "8.20.0", "status": "affected", "version": "8.20.0", "versionType": "semver"}, {"lessThanOrEqual": "8.19.0", "status": "affected", "version": "8.19.0", "versionType": "semver"}, {"lessThanOrEqual": "8.18.0", "status": "affected", "version": "8.18.0", "versionType": "semver"}, {"lessThanOrEqual": "8.17.0", "status": "affected", "version": "8.17.0", "versionType": "semver"}, {"lessThanOrEqual": "8.16.0", "status": "affected", "version": "8.16.0", "versionType": "semver"}, {"lessThanOrEqual": "8.15.0", "status": "affected", "version": "8.15.0", "versionType": "semver"}, {"lessThanOrEqual": "8.14.1", "status": "affected", "version": "8.14.1", "versionType": "semver"}, {"lessThanOrEqual": "8.14.0", "status": "affected", "version": "8.14.0", "versionType": "semver"}, {"lessThanOrEqual": "8.13.0", "status": "affected", "version": "8.13.0", "versionType": "semver"}, {"lessThanOrEqual": "8.12.1", "status": "affected", "version": "8.12.1", "versionType": "semver"}, {"lessThanOrEqual": "8.12.0", "status": "affected", "version": "8.12.0", "versionType": "semver"}, {"lessThanOrEqual": "8.11.1", "status": "affected", "version": "8.11.1", "versionType": "semver"}, {"lessThanOrEqual": "8.11.0", "status": "affected", "version": "8.11.0", "versionType": "semver"}, {"lessThanOrEqual": "8.10.1", "status": "affected", "version": "8.10.1", "versionType": "semver"}, {"lessThanOrEqual": "8.10.0", "status": "affected", "version": "8.10.0", "versionType": "semver"}]}], "source": "2499f714-1537-4658-8207-48ae4bb9eae9"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "By permanently omitting the final control-response line, a malicious FTP,\nIMAP, POP3, or SMTP server can exploit libcurl and completely bypass its\nconfigured transfer timeout mechanism, indefinitely blocking all concurrent\ntransfers bound to the same multi-handle."}], "id": "CVE-2026-92387", "lastModified": "2026-10-22T17:21:57.293", "metrics": {}, "published": "2026-10-20T21:17:21.133", "references": [{"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "url": "https://curl.se/docs/CVE-2026-92387.html"}, {"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "url": "https://curl.se/docs/CVE-2026-92387.json"}, {"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "url": "https://hackerone.com/reports/4022003"}], "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9", "vulnStatus": "Awaiting Analysis"}

{"acknowledgement": "Red Hat would like to thank Joshua Rogers (Aisle Research) for reporting this issue.", "bugzilla": {"description": "curl: curl: never-ending loop via server response omission", "id": "2550691", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550691"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-835", "details": ["A flaw was found in curl. When communicating with a malicious server using protocols such as FTP, IMAP, POP3, or SMTP, the server can trigger an infinite loop by continuously transmitting data while omitting the final control response line. This behavior bypasses configured transfer timeouts, indefinitely blocking concurrent transfers and resulting in a Denial of Service (DoS)."], "name": "CVE-2026-92387", "package_state": [{"cpe": "cpe:/a:redhat:confidential_compute_attestation:1", "fix_state": "Not affected", "package_name": "build-of-trustee/trustee-rhel9", "product_name": "Confidential Compute Attestation"}, {"cpe": "cpe:/a:redhat:confidential_compute_attestation:1", "fix_state": "Not affected", "package_name": "openshift-sandboxed-containers/osc-podvm-payload-rhel9", "product_name": "Confidential Compute Attestation"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "igvm", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rust", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "s390utils", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "snphost", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "trustee", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "rust", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "snphost", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "curl", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "rust", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Fix deferred", "package_name": "jbcs-httpd24-curl", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Not affected", "package_name": "foreman", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "openvox-agent", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Not affected", "package_name": "puppet-agent", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-10-14T12:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-92387\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-92387"], "statement": "This vulnerability is rated as Low severity by Red Hat because successful exploitation requires connecting to an untrusted server under specific network throughput conditions and only results in denial of service for concurrent transfers. The standard curl command-line utility is unaffected, confining the flaw to applications utilizing libcurl asynchronous multi-handles. Additionally, the issue is limited to transactions using interactive protocols such as FTP, IMAP, POP3, or SMTP where an adversarial endpoint continuously streams data without final status terminators.", "threat_severity": "Low"}