A deeply nested multipart MIME structure constructed via the public API causes a stack overflow in libcurl during normal cleanup operations. (CVE-2026-92391)
Description
A stack overflow vulnerability exists in libcurl triggered by a deeply nested multipart MIME structure created via the public API. The issue occurs during normal cleanup operations when the function curl_mime_free encounters excessive recursion depth, causing unbounded stack frame allocation and crashing the host process.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-92391 describes a stack overflow in libcurl caused by constructing a deeply nested multipart MIME structure through the public API. During cleanup, the curl_mime_free function recursively traverses the MIME structure. Excessive nesting leads to unbounded recursion depth, resulting in stack frame exhaustion and a crash of the host process.
Potential Impact
The vulnerability causes a denial of service by crashing the host process due to stack overflow during cleanup of multipart MIME data. There is no information about code execution or data corruption impacts.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-gm44-4wrm-hqf2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-92391"]
Threat ID: 6ad7ec102cdf04f6566aefb2
Added to database: 10/20/2026, 22:32:48 UTC
Last enriched: 10/20/2026, 22:35:32 UTC
Last updated: 10/21/2026, 00:08:20 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.