[ CVE-2026-92388 · Published 20 Oct 2026 ]
Vulnerability in curl
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ Advisories ]Government CERT advisories
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CERT-FRCERTFR-2026-AVI-1307
Multiple vulnerabilities in Curl Translated from French
Multiple vulnerabilities have been discovered in Curl. Some of them allow an attacker to cause remote arbitrary code execution, remote denial of service and a breach of data confidentiality.
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BSI CERT-BundWID-SEC-2026-3904
cURL: Multiple vulnerabilities Translated from German