Medium
Excessive resource consumption when sending long emoji names in user custom status
Type: advisorySources: OSV
Mattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-24988
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 17:52 UTC · Revision 1
Source evidence
Excessive resource consumption when sending long emoji names in user custom status
core-osv · Original sourcePublished 29 Feb 2024, 08:06 UTC
Mattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.
osv:CVE-2024-24988
Complete source record
{
"id": "3da871ba48967299f3631c8bfa4fb91ecdaa5dec10fd093b4ddbe91579325dd7",
"url": "https://osv.dev/vulnerability/CVE-2024-24988",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Excessive resource consumption when sending long emoji names in user custom status",
"summary": "Mattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.",
"evidence": "osv:CVE-2024-24988",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2024-24988",
"aliases": [
"BIT-mattermost-2024-24988",
"CVE-2024-24988",
"GHSA-6mx3-9qfh-77gj",
"GO-2024-2589"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "eb0621908b3d9ecef077b855b25111431097b0d0"
},
{
"introduced": "987e843629fe3f11861fda23ceb66884f5973ef1"
},
{
"fixed": "cfa2c72aa5497fdb81965e561955dab806ed1002"
},
{
"introduced": "b47be1c0f5787562ddf430dd5c5b8b3c35748b06"
},
{
"fixed": "958c7a2f05ee946af7540396c911d05c72f33538"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "8.1.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.0.0"
},
{
"fixed": "9.1.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.2.0"
},
{
"fixed": "9.2.4"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"v9.2.1",
"v9.1.2-rc1",
"v9.2.0-rc2",
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"v9.1.0-rc1",
"cloud-2023-09-26-1",
"v8.1.2-rc2",
"v8.1.2",
"v8.1.2-rc1",
"server/public/v0.0.9",
"v8.1.1-rc2",
"v8.1.1",
"@mattermost/types@8.1.1",
"@mattermost/client@8.1.1",
"v8.1.1-rc1",
"v8.1.0-rc2",
"v8.1.0",
"server/public/v0.0.8",
"cloud-2023-07-26-1",
"server/public/v0.0.7",
"server/public/v0.0.6",
"server/public/v0.0.5",
"cloud-2022-11-24-1",
"cloud-2022-11-11-1",
"cloud-2022-10-06-1",
"cloud-2022-09-08-1",
"cloud-2022-08-10-1",
"cloud-2022-07-20-1",
"v5.2.0-rc2",
"v5.2.0-rc1",
"v5.1.0-rc1",
"v5.0.0-rc1",
"v4.10.0-rc1",
"v4.9.0-rc1",
"v4.8.0-rc1",
"v4.7.0-rc1",
"v4.6.0-rc2",
"v4.6.0-rc1",
"v4.5.0-rc1",
"v4.4.0-rc1",
"v4.3.0-rc1",
"v4.2.0-rc1",
"v0.5.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-24988.json"
}
}
],
"modified": "2026-10-28T02:30:21.716482180Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/24xxx/CVE-2024-24988.json",
"https://nvd.nist.gov/vuln/detail/CVE-2024-24988"
],
"provider_metadata": {
"cwe_ids": [
"CWE-400"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"last_affected": "9.2.4"
},
{
"last_affected": "8.1.8"
},
{
"last_affected": "9.3.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/24xxx/CVE-2024-24988.json"
}
},
"related_cves": [
{
"value": "CVE-2024-24988",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 487884,
"published_at": "2024-02-29T08:06:28.334+00:00"
}