CVE-2026-92388
Received
Received - Intake
Heap Use-After-Free in libcurl FTP Wildcard LIST Handling
Vulnerability report for CVE-2026-92388, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-20
Last updated on: 2026-10-20
Assigner: curl
Description
Description
When an FTP wildcard `LIST` operation fails, libcurl omits the restoration
path meant for successful listings, leaving the write callback set to the
internal listing parser and the write callback data pointing directly to the
easy handle. Subsequent reuse of this handle triggers an immediate crash, and
cloning it via `curl_easy_duphandle()` copies this corrupted state into the
duplicate. If the original handle is subsequently freed, executing a transfer
on the cloned handle causes a heap use-after-free read against the dangling
handle reference; alternatively, reusing the original or cloned handle while
changing only `CURLOPT_WRITEDATA` (and omitting `CURLOPT_WRITEFUNCTION`)
results in type confusion, forcing the internal parser to interpret incoming
server response bytes into memory at the application-supplied write data
pointer.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| curl | curl | 8.22.0 |
| curl | curl | 8.21.0 |
| curl | curl | 8.20.0 |
| curl | curl | 8.19.0 |
| curl | curl | 8.18.0 |
| curl | curl | 8.17.0 |
| curl | curl | 8.16.0 |
| curl | curl | 8.15.0 |
| curl | curl | 8.14.1 |
| curl | curl | 8.14.0 |
| curl | curl | 8.13.0 |
| curl | curl | 8.12.1 |
| curl | curl | 8.12.0 |
| curl | curl | 8.11.1 |
| curl | curl | 8.11.0 |
| curl | curl | 8.10.1 |
| curl | curl | 8.10.0 |
| curl | curl | 8.9.1 |
| curl | curl | 8.9.0 |
| curl | curl | 8.8.0 |
| curl | curl | 8.7.1 |
| curl | curl | 8.7.0 |
| curl | curl | 8.6.0 |
| curl | curl | 8.5.0 |
| curl | curl | 8.4.0 |
| curl | curl | 8.3.0 |
| curl | curl | 8.2.1 |
| curl | curl | 8.2.0 |
| curl | curl | 8.1.2 |
| curl | curl | 8.1.1 |
| curl | curl | 8.1.0 |
| curl | curl | 8.0.1 |
| curl | curl | 8.0.0 |
| curl | curl | 7.88.1 |
| curl | curl | 7.88.0 |
| curl | curl | 7.87.0 |
| curl | curl | 7.86.0 |
| curl | curl | 7.85.0 |
| curl | curl | 7.84.0 |
| curl | curl | 7.83.1 |
| curl | curl | 7.83.0 |
| curl | curl | 7.82.0 |
| curl | curl | 7.81.0 |
| curl | curl | 7.80.0 |
| curl | curl | 7.79.1 |
| curl | curl | 7.79.0 |
| curl | curl | 7.78.0 |
| curl | curl | 7.77.0 |
| curl | curl | 7.76.1 |
| curl | curl | 7.76.0 |
| curl | curl | 7.75.0 |
| curl | curl | 7.74.0 |
| curl | curl | 7.73.0 |
| curl | curl | 7.72.0 |
| curl | curl | 7.71.1 |
| curl | curl | 7.71.0 |
| curl | curl | 7.70.0 |
| curl | curl | 7.69.1 |
| curl | curl | 7.69.0 |
| curl | curl | 7.68.0 |
| curl | curl | 7.67.0 |
| curl | curl | 7.66.0 |
| curl | curl | 7.65.3 |
| curl | curl | 7.65.2 |
| curl | curl | 7.65.1 |
| curl | curl | 7.65.0 |
| curl | curl | 7.64.1 |
| curl | curl | 7.64.0 |
| curl | curl | 7.63.0 |
| curl | curl | 7.62.0 |
| curl | curl | 7.61.1 |
| curl | curl | 7.61.0 |
| curl | curl | 7.60.0 |
| curl | curl | 7.59.0 |
| curl | curl | 7.58.0 |
| curl | curl | 7.57.0 |
| curl | curl | 7.56.1 |
| curl | curl | 7.56.0 |
| curl | curl | 7.55.1 |
| curl | curl | 7.55.0 |
| curl | curl | 7.54.1 |
| curl | curl | 7.54.0 |
| curl | curl | 7.53.1 |
| curl | curl | 7.53.0 |
| curl | curl | 7.52.1 |
| curl | curl | 7.52.0 |
| curl | curl | 7.51.0 |
| curl | curl | 7.50.3 |
| curl | curl | 7.50.2 |
| curl | curl | 7.50.1 |
| curl | curl | 7.50.0 |
| curl | curl | 7.49.1 |
| curl | curl | 7.49.0 |
| curl | curl | 7.48.0 |
| curl | curl | 7.47.1 |
| curl | curl | 7.47.0 |
| curl | curl | 7.46.0 |
| curl | curl | 7.45.0 |
| curl | curl | 7.44.0 |
| curl | curl | 7.43.0 |
| curl | curl | 7.42.1 |
| curl | curl | 7.42.0 |
| curl | curl | 7.41.0 |
| curl | curl | 7.40.0 |
| curl | curl | 7.39.0 |
| curl | curl | 7.38.0 |
| curl | curl | 7.37.1 |
| curl | curl | 7.37.0 |
| curl | curl | 7.36.0 |
| curl | curl | 7.35.0 |
| curl | curl | 7.34.0 |
| curl | curl | 7.33.0 |
| curl | curl | 7.32.0 |
| curl | curl | 7.31.0 |
| curl | curl | 7.30.0 |
| curl | curl | 7.29.0 |
| curl | curl | 7.28.1 |
| curl | curl | 7.28.0 |
| curl | curl | 7.27.0 |
| curl | curl | 7.26.0 |
| curl | curl | 7.25.0 |
| curl | curl | 7.24.0 |
| curl | curl | 7.23.1 |
| curl | curl | 7.23.0 |
| curl | curl | 7.22.0 |
| curl | curl | 7.21.7 |
| curl | curl | 7.21.6 |
| curl | curl | 7.21.5 |
| curl | curl | 7.21.4 |
| curl | curl | 7.21.3 |
| curl | curl | 7.21.2 |
| curl | curl | 7.21.1 |
| curl | curl | 7.21.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
