High
Tempo query limit results in unbounded memory allocation
Type: advisorySources: OSV
Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy. Mitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). Alternatively, automatically restart the service.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-21728
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 16:40 UTC · Revision 1
Source evidence
Tempo query limit results in unbounded memory allocation
core-osv · Original sourcePublished 24 Apr 2026, 08:00 UTC
Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy. Mitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). Alternatively, automatically restart the service.
osv:CVE-2026-21728
Complete source record
{
"id": "83510e7e57da4b45b8ff91f9fa0e82428f85f1cc34f8fbddd99bf9c36b8415a3",
"url": "https://osv.dev/vulnerability/CVE-2026-21728",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Tempo query limit results in unbounded memory allocation",
"summary": "Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy. Mitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). Alternatively, automatically restart the service.",
"evidence": "osv:CVE-2026-21728",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-21728",
"aliases": [
"CVE-2026-21728",
"GHSA-p4r4-xvrq-gvmc",
"GO-2026-5528"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/grafana/tempo",
"type": "GIT",
"events": [
{
"introduced": "be6476d9a1d171055f284c434f3432615258ca1c"
},
{
"fixed": "8ce8017366bc1106b75c20864f200ad84f649515"
},
{
"introduced": "607c7fb69662262bbb4462da1e2d91067dab6785"
},
{
"fixed": "f9ce27b87f3f95d1d4533cef143e360be0c4a829"
},
{
"introduced": "5773eb8b0bdd4439a6c065e54f777e4f77d419a1"
},
{
"fixed": "9ce71d29b791b6a3ee7397038a85d8afc3a250fd"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.3.0"
},
{
"fixed": "2.8.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.9.0"
},
{
"fixed": "2.9.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.10.0"
},
{
"fixed": "2.10.2"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v2.10.1",
"v2.10.0",
"v2.9.1",
"v2.8.3",
"v2.8.2",
"v2.9.0",
"v2.8.1",
"v2.8.0",
"v2.8.0-rc.1",
"v2.8.0-rc.0",
"v2.7.0-rc.0",
"v2.6.0-rc.0",
"v2.5.0-rc.1",
"v2.5.0-rc.0",
"v2.4.0",
"v2.4.0-rc.0",
"v2.3.0-rc.0",
"v2.2.0-rc.0",
"v2.1.0-rc.0",
"v2.0.0",
"v2.0.0-rc.0",
"v1.5.0",
"v1.5.0-rc.2",
"v1.5.0-rc.1",
"v1.5.0-rc.0",
"v1.4.0",
"v1.4.0-rc.0",
"v1.3.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21728.json"
}
}
],
"modified": "2026-10-28T02:30:37.320618380Z",
"provider": "osv",
"references": [
"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json",
"https://access.redhat.com/errata/RHSA-2026:21769",
"https://access.redhat.com/errata/RHSA-2026:22347",
"https://access.redhat.com/errata/RHSA-2026:22423",
"https://access.redhat.com/errata/RHSA-2026:23345",
"https://access.redhat.com/errata/RHSA-2026:24503",
"https://access.redhat.com/security/cve/CVE-2026-21728",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21728.json",
"https://grafana.com/security/security-advisories/cve-2026-21728",
"https://nvd.nist.gov/vuln/detail/CVE-2026-21728",
"https://bugzilla.redhat.com/show_bug.cgi?id=2461395"
],
"provider_metadata": {
"cna_assigner": "GRAFANA",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "1.3.0"
},
{
"last_affected": "2.8.3"
},
{
"introduced": "2.9.0"
},
{
"last_affected": "2.9.1"
},
{
"introduced": "2.10.0"
},
{
"last_affected": "2.10.1"
},
{
"introduced": "1.0.0"
},
{
"last_affected": "2.8.7"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21728.json"
}
},
"related_cves": [
{
"value": "CVE-2026-21728",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 504840,
"published_at": "2026-04-24T08:00:47.074+00:00"
}