CVE-2026-92391 - Vulnerability Details - OpenCVE

A flaw was found in curl. An attacker could supply deeply nested Multipurpose Internet Mail Extensions (MIME) structures to an application utilizing the libcurl library. During memory cleanup in the curl_mime_free function, excessive recursive calls exhaust available stack memory, leading to an application crash and a Denial of Service (DoS).

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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Project Subscriptions

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Advisories

Source	ID	Title
Ubuntu USN	USN-8927-1	curl vulnerabilities
Ubuntu USN	USN-8932-1	curl vulnerabilities

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://nvd.nist.gov/vuln/detail/CVE-2026-92391
https://www.cve.org/CVERecord?id=CVE-2026-92391

History

Sat, 17 Oct 2026 00:30:00 +0000

Type	Values Removed	Values Added
Description		A flaw was found in curl. An attacker could supply deeply nested Multipurpose Internet Mail Extensions (MIME) structures to an application utilizing the libcurl library. During memory cleanup in the curl_mime_free function, excessive recursive calls exhaust available stack memory, leading to an application crash and a Denial of Service (DoS).
Title		curl: curl: curl_mime_free stack overflow by recursion
Weaknesses		CWE-674
References		https://nvd.nist.gov/vuln/detail/CVE-2026-92391 https://www.cve.org/CVERecord?id=CVE-2026-92391
Metrics	threat_severity `None`	cvssV3_1 `{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}` threat_severity `Low`

Projects

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MITRE

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Vulnrichment

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NVD

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Redhat

Severity : Low

Publid Date: 2026-10-14T12:00:00Z

Links: CVE-2026-92391 - Bugzilla

OpenCVE Enrichment

Updated: 2026-10-17T02:00:07Z

Weaknesses

CWE-674

{"acknowledgement": "Red Hat would like to thank Joshua Rogers (Aisle Research) for reporting this issue.", "bugzilla": {"description": "curl: curl: curl_mime_free stack overflow by recursion", "id": "2550708", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550708"}, "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-674", "details": ["A flaw was found in curl. An attacker could supply deeply nested Multipurpose Internet Mail Extensions (MIME) structures to an application utilizing the libcurl library. During memory cleanup in the curl_mime_free function, excessive recursive calls exhaust available stack memory, leading to an application crash and a Denial of Service (DoS)."], "name": "CVE-2026-92391", "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": "Fix deferred", "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": "Fix deferred", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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": "Fix deferred", "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": "Fix deferred", "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-2026-92391\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-92391"], "statement": "This vulnerability is rated as Low severity because triggering the crash requires an application to construct thousands of nested MIME structures via libcurl's API, an atypical pattern not encountered in normal deployments. Furthermore, the curl command-line utility is not affected, restricting the blast radius strictly to custom or third-party applications invoking these specific functions. The resulting stack exhaustion leads only to a denial of service through process termination without compromising confidentiality or integrity.", "threat_severity": "Low"}