CVE-2026-103937 Details
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.
A denial-of-service vulnerability has been identified in Misskey, an open-source federated social media platform. This issue affects Misskey versions 13.0.0 prior to 2025.4.1, as well as versions 2025.5.0 prior to 2026.7.0. The vulnerability arises because cleanup processing may not be properly executed during file uploads. As a result, repeated uploads can lead to exhaustion of storage or file descriptors, causing a denial-of-service condition. This issue occurs regardless of whether federation is enabled.
Users can upgrade to Misskey version 2026.7.0 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 13, 2026CISA-ADP
Assessed Oct 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/misskey-dev/misskey/commit/3f28489fb856e6e07a16290f3ea1e1261572b527 | [email protected] | Source CodeVendor |
| https://github.com/misskey-dev/misskey/pull/17750 | [email protected] | Source CodeVendor |
| https://github.com/misskey-dev/misskey/releases/tag/2026.7.0 | [email protected] | Release NotesVendor |
| https://github.com/misskey-dev/misskey/security/advisories/GHSA-m9xp-2fvm-pfmq | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-459 | Incomplete Cleanup | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Misskey | >= 13.0.0, < 2025.4.1 (semver) >= 2025.5.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 14, 2026 | CVE Modified | CISA-ADP |
| Oct 13, 2026 | New CVE Received | [email protected] |