CVE-2026-92391
HIGHCVSS 7.5/10EPSS 0.36%
Last modified
CVE-2026-92391 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.36% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| curl | curl | >= 8.22.0, <= 8.22.0; >= 8.21.0, <= 8.21.0; >= 8.20.0, <= 8.20.0; >= 8.19.0, <= 8.19.0; >= 8.18.0, <= 8.18.0; >= 8.17.0, <= 8.17.0; >= 8.16.0, <= 8.16.0; >= 8.15.0, <= 8.15.0; >= 8.14.1, <= 8.14.1; >= 8.14.0, <= 8.14.0; >= 8.13.0, <= 8.13.0; >= 8.12.1, <= 8.12.1; >= 8.12.0, <= 8.12.0; >= 8.11.1, <= 8.11.1; >= 8.11.0, <= 8.11.0; >= 8.10.1, <= 8.10.1; >= 8.10.0, <= 8.10.0; >= 8.9.1, <= 8.9.1; >= 8.9.0, <= 8.9.0; >= 8.8.0, <= 8.8.0; >= 8.7.1, <= 8.7.1; >= 8.7.0, <= 8.7.0; >= 8.6.0, <= 8.6.0; >= 8.5.0, <= 8.5.0; >= 8.4.0, <= 8.4.0; >= 8.3.0, <= 8.3.0; >= 8.2.1, <= 8.2.1; >= 8.2.0, <= 8.2.0; >= 8.1.2, <= 8.1.2; >= 8.1.1, <= 8.1.1; >= 8.1.0, <= 8.1.0; >= 8.0.1, <= 8.0.1; >= 8.0.0, <= 8.0.0; >= 7.88.1, <= 7.88.1; >= 7.88.0, <= 7.88.0; >= 7.87.0, <= 7.87.0; >= 7.86.0, <= 7.86.0; >= 7.85.0, <= 7.85.0; >= 7.84.0, <= 7.84.0; >= 7.83.1, <= 7.83.1; >= 7.83.0, <= 7.83.0; >= 7.82.0, <= 7.82.0; >= 7.81.0, <= 7.81.0; >= 7.80.0, <= 7.80.0; >= 7.79.1, <= 7.79.1; >= 7.79.0, <= 7.79.0; >= 7.78.0, <= 7.78.0; >= 7.77.0, <= 7.77.0; >= 7.76.1, <= 7.76.1; >= 7.76.0, <= 7.76.0; >= 7.75.0, <= 7.75.0; >= 7.74.0, <= 7.74.0; >= 7.73.0, <= 7.73.0; >= 7.72.0, <= 7.72.0; >= 7.71.1, <= 7.71.1; >= 7.71.0, <= 7.71.0; >= 7.70.0, <= 7.70.0; >= 7.69.1, <= 7.69.1; >= 7.69.0, <= 7.69.0; >= 7.68.0, <= 7.68.0; >= 7.67.0, <= 7.67.0; >= 7.66.0, <= 7.66.0; >= 7.65.3, <= 7.65.3; >= 7.65.2, <= 7.65.2; >= 7.65.1, <= 7.65.1; >= 7.65.0, <= 7.65.0; >= 7.64.1, <= 7.64.1; >= 7.64.0, <= 7.64.0; >= 7.63.0, <= 7.63.0; >= 7.62.0, <= 7.62.0; >= 7.61.1, <= 7.61.1; >= 7.61.0, <= 7.61.0; >= 7.60.0, <= 7.60.0; >= 7.59.0, <= 7.59.0; >= 7.58.0, <= 7.58.0; >= 7.57.0, <= 7.57.0; >= 7.56.1, <= 7.56.1; >= 7.56.0, <= 7.56.0 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is 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.
How severe is CVE-2026-92391?
CVE-2026-92391 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.
How do I fix CVE-2026-92391?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-92386When writing a long cookie name and value to a Netscape cook…8.1
- CVE-2026-92387By permanently omitting the final control-response line, a m…8.1
- CVE-2026-92388When an FTP wildcard `LIST` operation fails, libcurl omits t…9.1
- CVE-2026-92389libcurl's TFTP state machine fails to validate state transit…8.1
- CVE-2026-9239The Meow Gallery plugin for WordPress is vulnerable to Store…6.4
- CVE-2026-92390When invoked with `--remote-header-name` (`-J`), curl fails …7.5
- CVE-2026-92392During an upload, curl mishandles HTTP/2 `RST_STREAM` receiv…8.1
- CVE-2026-92393Apache YuniKorn 1.9.0 and earlier does not implement label a…2
- CVE-2026-92395@fastify/proxy-addr is a Fastify plugin that determines a re…9.1
- CVE-2026-92397A vulnerability has been found in Ruijie RG-EW3000GX EW_3.0(…9.1
- CVE-2026-92398A vulnerability was found in Ruijie RG-EW3000GX EW_3.0(1)B11…9.1
- CVE-2026-92399A vulnerability was determined in GPAC 26.07.0. This affects…7.3
Are you affected by CVE-2026-92391?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST