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OpenAdvisories
High · 8.7 CVE-2026-103937 EUVD-2026-99240

Misskey: Denial of service resulting from insufficient cleanup processing during file uploads

Published Oct 13, 2026 · Updated Oct 14, 2026 · Assigned by GitHub_M

Description

Misskey is an open source, federated social media platform. From 13.0.0 until 2025.4.1 and from 2025.5.0 until 2026.7.0, cleanup processing may not execute during file uploads. Repeated uploads can exhaust storage or file descriptors and deny service regardless of whether federation is enabled. This issue is fixed in version 2026.7.0.

Affected products

VendorProductAffectedFixed
misskey-dev misskey >= 12.0.0, <= 13.14.2, >= 2023.9.0-beta.1, < 2025.4.1, >= 2025.5.0, < 2026.7.0 —

References