CVE-2026-92389

Not enough EPSS history yet.

libcurl's TFTP state machine fails to validate state transitions against the requested transfer direction, accepting opening server responses for both reads and writes interchangeably. A malicious TFTP server can respond to a download request in a way that forces the client into transmit mode, prompting libcurl to consume and transmit data from the handle's persistent `CURLOPT_READDATA` pointer - including data remaining from unrelated prior operations, such as an HTTP POST request executed on a reused handle.

• curl.sehttps://curl.se/docs/CVE-2026-92389.html
• curl.sehttps://curl.se/docs/CVE-2026-92389.json
• hackerone.comhttps://hackerone.com/reports/4022568

No related CVEs by CWE or product.