CVE-2026-65058: Unconfirmed Streamed Chunk Hashing

A networked data chunk is fetched in a loop and hashed directly without prior validation or confirmation. This can lead to a Time-of-Check to Time-of-Use (TOCTOU) vulnerability where the user confirms an initial data subset but a malicious host provides different subsequent chunks during the hashing phase.

Provally CuratedPublic repositoryHighMedium confidenceVerifiedApache-2.0Python
greprules fetch cve-2026-65058-unconfirmed-streamed-chunk-hashing --engine opengrep

Description

A networked data chunk is fetched in a loop and hashed directly without prior validation or confirmation. This can lead to a Time-of-Check to Time-of-Use (TOCTOU) vulnerability where the user confirms an initial data subset but a malicious host provides different subsequent chunks during the hashing phase.