CVE-2026-27878

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Source
https://cve.org/CVERecord?id=CVE-2026-27878
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-27878.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-27878
Aliases
Downstream
CGA (36)
MINI (16)
openSUSE (1)
Related
Published
2026-06-19T19:02:27Z
Modified
2026-09-10T18:27:15Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Tempo TraceQL query with exemplar hint could result in unbounded memory usage
Details

A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.

Database specific 
{
    "cna_assigner":  "GRAFANA",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27878.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "2.6.1"
                },
                {
                    "fixed":  "2.8.8"
                },
                {
                    "introduced":  "2.6.0"
                },
                {
                    "fixed":  "2.10.2"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/grafana/tempo

Affected ranges

Type
GIT
Repo
https://github.com/grafana/tempo
Events
Introduced
e85bbc57de52cc9044bc0911de0d1afe5d1fbe07
Fixed
8ce8017366bc1106b75c20864f200ad84f649515
Introduced
607c7fb69662262bbb4462da1e2d91067dab6785
Fixed
f9ce27b87f3f95d1d4533cef143e360be0c4a829
Introduced
5773eb8b0bdd4439a6c065e54f777e4f77d419a1
Fixed
9ce71d29b791b6a3ee7397038a85d8afc3a250fd
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "2.6.0"
        },
        {
            "fixed":  "2.8.4"
        },
        {
            "introduced":  "2.9.0"
        },
        {
            "fixed":  "2.9.2"
        },
        {
            "introduced":  "2.10.0"
        },
        {
            "fixed":  "2.10.2"
        }
    ],
    "source":  "CPE_RANGE"
}

Affected versions

v2.*
v2.10.0
v2.10.1
v2.9.0
v2.9.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-27878.json"