CVE-2026-92391

A deeply nested multipart MIME structure constructed via the public API causes a stack overflow in libcurl during normal cleanup operations. An excessive recursion depth within `curl_mime_free` leads to unbounded stack frame allocation during structure traversal, ultimately crashing the host process.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://curl.se/docs/CVE-2026-92391.html
https://curl.se/docs/CVE-2026-92391.json
https://hackerone.com/reports/4024222
https://hackerone.com/reports/4024222

Configurations

No configuration.

History

30 Oct 2026, 17:17

Type	Values Removed	Values Added
CWE		CWE-674
References	~~() https://hackerone.com/reports/4024222 -~~	() https://hackerone.com/reports/4024222 -
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

20 Oct 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-20 21:17

Updated : 2026-10-30 17:17

NVD link : CVE-2026-92391

Mitre link : CVE-2026-92391

CVE.ORG link : CVE-2026-92391

JSON object : View

Products Affected

No product.

CWE

CWE-674

Uncontrolled Recursion

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"2499f714-1537-4658-8207-48ae4bb9eae9"}, {"url": "https://hackerone.com/reports/4024222", "source": "2499f714-1537-4658-8207-48ae4bb9eae9"}, {"url": "https://hackerone.com/reports/4024222", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-674"}]}], "descriptions": [{"lang": "en", "value": "A deeply nested multipart MIME structure constructed via the public API causes\na stack overflow in libcurl during normal cleanup operations. An excessive\nrecursion depth within `curl_mime_free` leads to unbounded stack frame\nallocation during structure traversal, ultimately crashing the host process."}], "lastModified": "2026-10-30T17:17:31.320", "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9"}