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CVE-2026-92389Published

TFTP direction confusion

Exact source revision recorded 30 Oct 2026 13:45:33 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-92389

Published

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.

Source published
20 Oct 2026 20:21:45 UTC
Source modified
30 Oct 2026 12:19:17 UTC
Observed here
30 Oct 2026 13:45:33 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

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Sources read 6 Nov 23:29 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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