CVE catalog
CVE-2026-21728
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
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.64% · Oct 25, 2026
A flaw was found in Tempo. A remote attacker can exploit this vulnerability by sending large queries to the Tempo service. This can lead to excessive memory allocations, potentially causing a Denial of Service (DoS) by impacting the availability of the service. grafana/tempo: Tempo: Denial of Service via large queries The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | tempo | Not reported | 2.8.4 | fixed |
| Cpe | tempo | Not reported | 2.9.2 | fixed |
| Cpe | tempo | Not reported | 2.10.2 | fixed |
| Cpe | tempo | Not reported | 2.10.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | tempo | cpe | Not reported | 2.8.4 | Not reported | Not reported | Not reported |
| Cpe | tempo | cpe | Not reported | 2.9.2 | Not reported | Not reported | Not reported |
| Cpe | tempo | cpe | Not reported | 2.10.2 | Not reported | Not reported | Not reported |
| Cpe | tempo | cpe | Not reported | 2.10.2 | Not reported | NVD-CVE-2026-21728 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [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://bugzilla.redhat.com/show_bug.cgi?id=2461395]
- [https://grafana.com/security/security-advisories/cve-2026-21728]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-21728]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2342.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]