High
Misskey: Denial of service resulting from insufficient cleanup processing during file uploads
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-103937
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 00:16 UTC · Revision 1
Source evidence
Misskey: Denial of service resulting from insufficient cleanup processing during file uploads
core-osv · Original sourcePublished 13 Oct 2026, 18:42 UTC
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.
osv:CVE-2026-103937
Complete source record
{
"id": "8a6f0ac018bab6e193aa40a713d4d93b17772854db3ee928e4d6f4852d938b73",
"url": "https://osv.dev/vulnerability/CVE-2026-103937",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Misskey: Denial of service resulting from insufficient cleanup processing during file uploads",
"summary": "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.",
"evidence": "osv:CVE-2026-103937",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-103937",
"aliases": [
"CVE-2026-103937",
"GHSA-m9xp-2fvm-pfmq"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/misskey-dev/misskey",
"type": "GIT",
"events": [
{
"introduced": "781cebf19406c9db4c769f35a78c991326393b98"
},
{
"last_affected": "a8d45d4b0d24e0c422d4e6d8feab57035239db56"
},
{
"introduced": "2939e8131d303f27ef24541fa8394369401be08b"
},
{
"fixed": "979cfc1bcd6399afa0477cbc6f7457a211f26cdc"
},
{
"introduced": "aa938164f27759bc566cae63f467b3d68a116e30"
},
{
"fixed": "8ea4a0ecac058688f69706ab88de1fcd439e2621"
},
{
"fixed": "3f28489fb856e6e07a16290f3ea1e1261572b527"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "12.0.0"
},
{
"last_affected": "13.14.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "2023.9.0-beta.1"
},
{
"fixed": "2025.4.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "2025.5.0"
},
{
"fixed": "2026.7.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "3f28489fb856e6e07a16290f3ea1e1261572b527"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "8ea4a0ecac058688f69706ab88de1fcd439e2621"
}
],
"source": "REFERENCES_TAG",
"original_tag": "2026.7.0"
}
]
}
}
],
"versions": [
"2026.7.0-alpha.5",
"2026.7.0-alpha.4",
"2026.7.0-alpha.3",
"2026.7.0-alpha.2",
"2026.7.0-alpha.1",
"2026.7.0-alpha.0",
"2026.6.1-alpha.1",
"2026.6.0-beta.1",
"2026.6.0-beta.0",
"2026.6.0-alpha.2",
"2026.6.0-alpha.1",
"2026.6.0-alpha.0",
"2026.5.4",
"2026.5.4-beta.0",
"2026.5.4-alpha.0",
"2026.5.3",
"2026.5.3-alpha.0",
"2026.5.2",
"2026.5.2-beta.1",
"2026.5.2-beta.0",
"2026.5.2-alpha.0",
"2026.5.1",
"2026.5.1-beta.0",
"2026.5.1-alpha.0",
"2026.5.0",
"2026.5.0-alpha.0",
"2026.4.0-beta.2",
"2026.4.0-beta.1",
"2026.4.0-beta.0",
"2026.4.0-alpha.6",
"2026.4.0-alpha.5",
"2026.4.0-alpha.4",
"2026.4.0-alpha.3",
"2026.4.0-alpha.2",
"2026.4.0-alpha.1",
"2026.4.0-alpha.0",
"2026.3.2",
"2026.3.2-beta.0",
"2026.3.2-alpha.2",
"2026.3.2-alpha.1",
"2026.3.2-alpha.0",
"2026.3.1",
"2026.3.1-alpha.0",
"2026.3.0",
"2026.3.0-alpha.0",
"2026.2.0-beta.0",
"2026.2.0-alpha.0",
"2026.1.0-beta.0",
"2026.1.0-alpha.4",
"2026.1.0-alpha.3",
"2026.1.0-alpha.2",
"2026.1.0-alpha.1",
"2026.1.0-alpha.0",
"2025.12.2",
"2025.12.2-beta.4",
"2025.12.2-beta.3",
"2025.12.2-beta.2",
"2025.12.2-alpha.0",
"2025.12.1",
"2025.12.1-alpha.1",
"2025.12.1-alpha.0",
"2025.12.0",
"2025.12.0-beta.0",
"2025.12.0-alpha.2",
"2025.12.0-alpha.1",
"2025.12.0-alpha.0",
"2025.11.2-alpha.4",
"2025.11.2-alpha.3",
"2025.11.2-alpha.2",
"2025.11.2-alpha.1",
"2025.11.2-alpha.0",
"2025.11.1",
"2025.11.1-beta.3",
"2025.11.1-beta.2",
"2025.11.1-beta.1",
"2025.11.1-beta.0",
"2025.11.1-alpha.2",
"2025.11.1-alpha.1",
"2025.11.1-alpha.0",
"2025.11.0",
"2025.11.0-rc.0",
"2025.11.0-beta.0",
"2025.11.0-alpha.4",
"2025.11.0-alpha.3",
"2025.11.0-alpha.2",
"2025.11.0-alpha.1",
"2025.11.0-alpha.0",
"2025.10.2",
"2025.10.2-beta.0",
"2025.10.2-alpha.0",
"2025.10.1",
"2025.10.1-beta.4",
"2025.10.1-beta.2",
"2025.10.1-beta.1",
"2025.10.1-beta.0",
"2025.10.1-alpha.6",
"2025.10.1-alpha.5",
"2025.10.1-alpha.4",
"2025.10.1-alpha.2",
"2025.10.1-alpha.1",
"2025.10.1-alpha.0",
"2025.10.0",
"2025.10.0-beta.2",
"2025.10.0-beta.1",
"2025.10.0-beta.0",
"2025.10.0-alpha.0",
"2025.9.1-alpha.2",
"2025.9.1-alpha.1",
"2025.9.1-alpha.0",
"2025.9.0",
"2025.9.0-rc.0",
"2025.9.0-beta.1",
"2025.9.0-beta.0",
"2025.9.0-alpha.2",
"2025.9.0-alpha.1",
"2025.9.0-alpha.0",
"2025.8.0",
"2025.8.0-rc.0",
"2025.8.0-beta.6",
"2025.8.0-beta.5",
"2025.8.0-beta.4",
"2025.8.0-beta.3",
"2025.8.0-beta.2",
"2025.8.0-beta.1",
"2025.8.0-beta.0",
"2025.8.0-alpha.13",
"2025.8.0-alpha.12",
"2025.8.0-alpha.11",
"2025.8.0-alpha.9",
"2025.8.0-alpha.8",
"2025.8.0-alpha.7",
"2025.8.0-alpha.6",
"2025.8.0-alpha.5",
"2025.8.0-alpha.4",
"2025.8.0-alpha.3",
"2025.8.0-alpha.2",
"2025.8.0-alpha.1",
"2025.8.0-alpha.0",
"2025.7.0",
"2025.7.0-rc.1",
"2025.7.0-rc.0",
"2025.7.0-beta.2",
"2025.7.0-beta.1",
"2025.7.0-alpha.0",
"2025.6.4-alpha.4",
"2025.6.4-alpha.3",
"2025.6.4-alpha.2",
"2025.6.4-alpha.1",
"2025.6.4-alpha.0",
"2025.6.3",
"2025.6.3-alpha.0",
"2025.6.2",
"2025.6.2-alpha.0",
"2025.6.1",
"2025.6.1-rc.0",
"2025.6.1-beta.2",
"2025.6.1-beta.1",
"2025.6.1-beta.0",
"2025.6.1-alpha.4",
"2025.6.1-alpha.2",
"2025.6.1-alpha.1",
"2025.6.1-alpha.0",
"2025.6.0",
"2025.6.0-beta.1",
"2025.6.0-beta.0",
"2025.6.0-alpha.0",
"2025.5.1",
"2025.5.1-beta.6",
"2025.5.1-beta.5",
"2025.5.1-beta.4",
"2025.5.1-beta.3",
"2025.5.1-beta.2",
"2025.5.1-beta.1",
"2025.5.1-alpha.5",
"2025.5.1-alpha.4",
"2025.5.1-alpha.3",
"2025.5.1-alpha.2",
"2025.5.1-alpha.1",
"2025.5.1-alpha.0",
"2025.5.0",
"2025.4.1-rc.0",
"2025.4.1-beta.9",
"2025.4.1-beta.8",
"2025.4.1-beta.7",
"2025.4.1-beta.6",
"2025.4.1-beta.2",
"2025.4.1-beta.0",
"2025.4.1-alpha.2",
"2025.4.1-alpha.1",
"2025.4.1-alpha.0",
"2025.4.0",
"2025.4.0-rc.5",
"2025.4.0-rc.4",
"2025.4.0-rc.0",
"2025.4.0-beta.1",
"2025.4.0-beta.0",
"2025.4.0-alpha.0",
"2025.3.2-beta.21",
"2025.3.2-beta.20",
"2025.3.2-beta.19",
"2025.3.2-beta.17",
"2025.3.2-beta.15",
"2025.3.2-beta.14",
"2025.3.2-beta.13",
"2025.3.2-beta.12",
"2025.3.2-beta.11",
"2025.3.2-beta.10",
"2025.3.2-beta.9",
"2025.3.2-beta.8",
"2025.3.2-beta.5",
"2025.3.2-beta.4",
"2025.3.2-beta.2",
"2025.3.2-beta.1",
"2025.3.2-beta.0",
"2025.3.2-alpha.11",
"2025.3.2-alpha.10",
"2025.3.2-alpha.8",
"2025.3.2-alpha.4",
"2025.3.2-alpha.3",
"2025.3.2-alpha.2",
"2025.3.2-alpha.1",
"2025.3.1",
"2025.3.1-beta.3",
"2025.3.1-beta.2",
"2025.3.1-beta.1",
"2025.3.1-beta.0",
"2025.3.1-alpha.0",
"2025.3.0",
"2025.3.0-beta.2",
"2025.3.0-beta.1",
"2025.3.0-beta.0",
"2025.3.0-alpha.0",
"2025.2.1",
"2025.2.1-beta.2",
"2025.2.1-beta.1",
"2025.2.1-beta.0",
"2025.2.1-alpha.0",
"2025.2.0",
"2025.2.0-beta.1",
"2025.2.0-beta.0",
"2025.2.0-alpha.0",
"2025.1.0",
"2025.1.0-beta.3",
"2025.1.0-beta.2",
"2025.1.0-beta.1",
"2025.1.0-beta.0",
"2025.1.0-alpha.0",
"2024.11.0",
"2024.11.0-beta.4",
"2024.11.0-alpha.3",
"2024.11.0-alpha.2",
"2024.11.0-alpha.1",
"2024.10.2-alpha.2",
"2024.10.2-alpha.1",
"2024.10.2-alpha.0",
"2024.10.1",
"2024.10.1-beta.6",
"2024.10.1-beta.5",
"2024.10.1-beta.4",
"2024.10.1-beta.3",
"2024.10.1-beta.2",
"2024.10.1-beta.1",
"2024.10.1-alpha.0",
"2024.10.0",
"2024.10.0-beta.6",
"2024.10.0-beta.5",
"2024.10.0-beta.4",
"2024.10.0-beta.3",
"2024.10.0-beta.2",
"2024.10.0-alpha.1",
"2024.10.0-alpha.0",
"2024.9.0",
"2024.9.0-beta.14",
"2024.9.0-alpha.13",
"2024.9.0-alpha.12",
"2024.9.0-alpha.11",
"2024.9.0-alpha.10",
"2024.9.0-alpha.9",
"2024.9.0-alpha.8",
"2024.9.0-alpha.7",
"2024.9.0-alpha.6",
"2024.9.0-alpha.5",
"2024.9.0-alpha.4",
"2024.9.0-alpha.3",
"2024.9.0-alpha.2",
"2024.9.0-alpha.1",
"2024.9.0-alpha.0",
"2024.8.0",
"2024.8.0-rc.5",
"2024.8.0-rc.4",
"2024.8.0-rc.3",
"2024.8.0-beta.2",
"2024.8.0-alpha.1",
"2024.8.0-alpha.0",
"2024.7.0",
"2024.7.0-rc.8",
"2024.7.0-rc.7",
"2024.7.0-rc.6",
"2024.7.0-rc.5",
"2024.7.0-rc.4",
"2024.7.0-beta.3",
"2024.7.0-beta.2",
"2024.7.0-beta.1",
"2024.7.0-beta.0",
"2024.2.0-beta.13",
"2024.2.0-beta.12",
"2024.2.0-beta.10",
"2024.2.0-beta.9",
"2024.2.0-beta.8",
"2024.2.0-beta.7",
"2024.2.0-beta.6",
"2024.2.0-beta.5",
"2024.2.0-beta.4",
"2024.2.0-beta.3",
"2024.2.0-beta.2",
"2024.2.0-beta.1",
"2023.12.0-beta.6",
"2023.12.0-beta.5",
"2023.12.0-beta.4",
"2023.12.0-beta.3",
"2023.12.0-beta.2",
"2023.12.0-beta.1",
"2023.11.1-beta.2",
"2023.11.1-beta.1",
"2023.11.0-beta.10",
"2023.11.0-beta.9",
"2023.11.0-beta.8",
"2023.11.0-beta.7",
"2023.11.0-beta.6",
"2023.11.0-beta.5",
"2023.11.0-beta.4",
"2023.11.0-beta.3",
"2023.11.0-beta.2",
"2023.11.0-beta.1",
"2023.10.2-beta.2",
"2023.10.2-beta.1",
"2023.10.0-beta.15",
"2023.10.0-beta.14",
"2023.10.0-beta.13",
"2023.10.0-beta.12",
"2023.10.0-beta.11",
"2023.10.0-beta.10",
"2023.10.0-beta.9",
"2023.10.0-beta.8",
"2023.10.0-beta.7",
"2023.10.0-beta.6",
"2023.10.0-beta.5",
"2023.10.0-beta.4",
"2023.10.0-beta.3",
"2023.10.0-beta.2",
"2023.10.0-beta.1",
"13.14.2",
"2023.9.0-rc.4",
"2023.9.0-rc.3",
"2023.9.0-rc.2",
"2023.9.0-rc.1",
"2023.9.0-beta.11",
"2023.9.0-beta.10",
"2023.9.0-beta.9",
"2023.9.0-beta.8",
"2023.9.0-beta.7",
"2023.9.0-beta.6",
"2023.9.0-beta.5",
"2023.9.0-beta.4",
"2023.9.0-beta.3",
"2023.9.0-beta.2",
"2023.9.0-beta.1",
"13.14.1",
"13.14.0",
"13.13.2",
"13.13.1",
"13.13.0",
"13.12.2",
"13.12.1",
"13.12.0",
"13.11.3",
"13.11.2",
"13.11.1",
"13.11.0",
"13.10.3",
"13.10.2",
"13.10.1",
"13.10.0",
"13.9.2",
"13.9.1",
"13.9.0",
"13.8.1",
"13.8.0",
"13.7.5",
"13.7.4",
"13.7.3",
"13.7.2",
"13.7.1",
"13.7.0",
"13.6.1",
"13.6.0",
"13.5.6",
"13.5.5",
"13.5.4",
"13.5.3",
"13.5.2",
"13.5.1",
"13.5.0",
"13.4.0",
"13.3.4",
"13.3.3",
"13.3.2",
"13.3.1",
"13.3.0",
"13.2.6",
"13.2.5",
"13.2.4",
"13.2.3",
"13.2.2",
"13.2.1",
"13.2.0",
"13.1.8",
"13.1.7",
"13.1.6",
"13.1.5",
"13.1.4",
"13.1.3",
"13.1.2",
"13.1.1",
"13.1.0",
"13.0.0",
"12.119.1",
"12.119.0",
"12.118.1",
"12.118.0",
"12.117.1",
"12.117.0",
"12.116.1",
"12.116.0",
"12.115.0",
"12.114.0",
"12.113.0",
"12.112.3",
"12.112.2",
"12.112.1",
"12.112.0",
"12.111.1",
"12.111.0",
"12.110.1",
"12.110.0",
"12.109.2",
"12.109.1",
"12.109.0",
"12.108.1",
"12.108.0",
"12.107.0",
"12.106.3",
"12.106.2",
"12.106.1",
"12.106.0",
"12.105.0",
"12.104.0",
"12.103.1",
"12.103.0",
"12.102.1",
"12.102.0",
"12.101.1",
"12.101.0",
"12.100.2",
"12.100.1",
"12.100.0",
"12.99.3",
"12.99.2",
"12.99.1",
"12.99.0",
"12.98.0",
"12.97.1",
"12.97.0",
"12.96.1",
"12.96.0",
"12.95.0",
"12.94.1",
"12.94.0",
"12.93.2",
"12.93.1",
"12.93.0",
"12.92.0",
"12.91.0",
"12.90.1",
"12.90.0",
"12.89.2",
"12.89.1",
"12.89.0",
"12.88.0",
"12.87.0",
"12.86.0",
"12.85.1",
"12.85.0",
"12.84.3",
"12.84.2",
"12.84.1",
"12.84.0",
"12.83.0",
"12.82.0",
"12.81.2",
"12.81.1",
"12.81.0",
"12.80.3",
"12.80.2",
"12.80.1",
"12.80.0",
"12.79.3",
"12.79.2",
"12.79.1",
"12.79.0",
"12.78.0",
"12.77.1",
"12.77.0",
"12.76.1",
"12.76.0",
"12.75.1",
"12.75.0",
"12.74.1",
"12.74.0",
"12.73.0",
"12.72.0",
"12.71.0",
"12.70.0",
"12.69.0",
"12.68.0",
"12.67.1",
"12.67.0",
"12.66.0",
"12.65.7",
"12.65.6",
"12.65.5",
"12.65.4",
"12.65.3",
"12.65.2",
"12.65.1",
"12.65.0",
"12.64.2",
"12.64.1",
"12.64.0",
"12.63.0",
"12.62.2",
"12.62.1",
"12.62.0",
"12.61.1",
"12.61.0",
"12.60.1",
"12.60.0",
"12.59.0",
"12.58.0",
"12.57.4",
"12.57.1",
"12.57.0",
"12.56.0",
"12.55.0",
"12.54.0",
"12.53.0",
"12.52.0",
"12.51.0",
"12.50.0",
"12.49.1",
"12.49.0",
"12.48.3",
"12.48.2",
"12.48.1",
"12.48.0",
"12.47.1",
"12.47.0",
"12.46.0",
"12.45.1",
"12.45.0",
"12.44.1",
"12.44.0",
"12.43.0",
"12.42.0",
"12.41.3",
"12.41.2",
"12.41.1",
"12.41.0",
"12.40.0",
"12.39.1",
"12.39.0",
"12.38.1",
"12.38.0",
"12.37.0",
"12.36.1",
"12.36.0",
"12.35.2",
"12.35.1",
"12.35.0",
"12.34.0",
"12.33.0",
"12.32.0",
"12.31.0",
"12.30.0",
"12.29.0",
"12.21.0",
"12.20.0",
"12.19.0",
"12.18.1",
"12.18.0",
"12.17.0",
"12.16.0",
"12.15.0",
"12.14.0",
"12.13.0",
"12.12.0",
"12.11.0",
"12.10.0",
"12.9.0",
"12.8.0",
"12.7.1",
"12.7.0",
"12.6.0",
"12.5.0",
"12.4.1",
"12.4.0",
"12.3.0",
"12.2.0",
"12.1.0",
"12.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103937.json"
}
}
],
"modified": "2026-10-28T02:30:51.925796909Z",
"provider": "osv",
"references": [
"https://github.com/misskey-dev/misskey/releases/tag/2026.7.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103937.json",
"https://github.com/misskey-dev/misskey/security/advisories/GHSA-m9xp-2fvm-pfmq",
"https://nvd.nist.gov/vuln/detail/CVE-2026-103937",
"https://github.com/misskey-dev/misskey/commit/3f28489fb856e6e07a16290f3ea1e1261572b527",
"https://github.com/misskey-dev/misskey/pull/17750"
],
"provider_metadata": {
"cwe_ids": [
"CWE-459"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103937.json"
}
},
"related_cves": [
{
"value": "CVE-2026-103937",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 520894,
"published_at": "2026-10-13T18:42:17.022+00:00"
}