CVE-2026-87815
CVSS v3
8.7
HIGH
EPSS Score
0.5 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.
Technical details
- Published
- 2026-09-09
- Last Modified
- 2026-09-09
Frequently asked questions
What is CVE-2026-87815?
SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.
Is CVE-2026-87815 actively exploited?
Active exploitation of CVE-2026-87815 has not been confirmed. Its EPSS score was 0.5% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-87815?
CVE-2026-87815 has a CVSS v3 base score of 8.7 (HIGH severity).
Is CVE-2026-87815 affecting your environment?
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