CVE-2026-100637

HIGHCVSS 7.6

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON files in pre-existing kernel-writable directories outside workspace boundaries.

Published 2026-09-26 · last modified 2026-09-26

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Ncerio by BeyondNets · data from NVD, CISA KEV, EPSS.