All vulnerabilities
CVE-2026-103937GHSA-m9xp-2fvm-pfmq

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

misskey-dev misskey
Open in ThreatlineRecord JSON
CVSS
8.7High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.50%Chance of exploitation activity in the next 30 days, higher than 42% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published13 Oct 2026Updated 14 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 3

  • misskeyaffected: >= 12.0.0, <= 13.14.2CVE List
  • misskeyaffected: >= 2023.9.0-beta.1, < 2025.4.1CVE List
  • misskeyaffected: >= 2025.5.0, < 2026.7.0CVE List

References 4