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.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 3
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 16:57
- StatusReceived → PublishedNVD modified 2026-10-20 20:21
- First seenunscoredNVD modified 2026-10-20 21:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.