What’s Vulnerable › Vulnerabilities

CVE-2026-92392: HTTP/2 upload Use-After-Free

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-14 · updated 2026-10-18
• Weakness: CWE-416

Description

During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.

Affected products

• curl: from 8.22.0 through 8.22.0; from 8.21.0 through 8.21.0; from 8.20.0 through 8.20.0; from 8.19.0 through 8.19.0; from 8.18.0 through 8.18.0; from 8.17.0 through 8.17.0

References

• https://curl.se/docs/CVE-2026-92392.html
• https://curl.se/docs/CVE-2026-92392.json
• https://hackerone.com/reports/4030333
• http://www.openwall.com/lists/oss-security/2026/10/18/5
• http://www.openwall.com/lists/oss-security/2026/10/18/6
• https://hackerone.com/reports/4030333

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