Vulnerability · Published Oct 14, 2026 · Assigned by curl
CVE-2026-92392HTTP/2 upload Use-After-Free
High 8.1
In plain English
A high-severity use-after-free in curl from curl. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)1.3%top 29.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.21 | curl | 8.14.1-r3 | ALPINE-CVE-2026-92392 |
| Alpine:v3.22 | curl | 8.14.1-r4 | ALPINE-CVE-2026-92392 |
| Alpine:v3.23 | curl | 8.23.0-r0 | ALPINE-CVE-2026-92392 |
| Alpine:v3.24 | curl | 8.23.0-r0 | ALPINE-CVE-2026-92392 |
| Debian:13 | curl | 8.14.1-2+deb13u7 | DEBIAN-CVE-2026-92392 |
| Debian:14 | curl | no fix listed | DEBIAN-CVE-2026-92392 |
| Ubuntu:26.04:LTS | curl | 8.18.0-1ubuntu2.8 | USN-8927-1 |
| Ubuntu:26.04:LTS | curl | 8.18.0-1ubuntu2.8 | UBUNTU-CVE-2026-92392 |
| Ubuntu:26.10 | curl | 8.20.0-2ubuntu11.1 | USN-8927-2 |
| Ubuntu:26.10 | curl | 8.20.0-2ubuntu11.1 | UBUNTU-CVE-2026-92392 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H