TI-2026-17502 Aliases CVE-2026-21729 GHSA-65p5-8cm9-qcxx

Loki detected_fields query limits results in unbounded memory allocation

LOW 39CWE-770Published 2026-07-16 · Updated 2026-08-27

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-770.

Summary

Loki queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0046 40th percentileScored 2026-11-07

Fix Fixed Loki (Grafana): v3.7.0Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Grafana	Loki	v3.0.0 to before v3.7.0	v3.7.0	Patch available	CNA

Loki VendorGrafana Affected v3.0.0 to before v3.7.0 Fixed in v3.7.0 Patch available CNA

Remediation

Fix · CNA Loki (Grafana) Fixed in v3.7.0

Red Hat 1 advisory

RHSA-2026:72570 Released 2026-09-28 · Red Hat rating Important
Red Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images loki3.6-3.6.17-0.3.hum1@aarch64, loki3.6-3.6.17-0.3.hum1@src, loki3.6-3.6.17-0.3.hum1@x86_64 +4

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Hardened Images	Fixed	RHSA-2026:72570

Timeline

2026-10-02 Threatist record created from CVE-2026-21729
2026-10-03 Alias added: GHSA-65p5-8cm9-qcxx

References

Advisory 1

https://grafana.com/security/security-advisories/cve-2026-21729

TI-2021-16611 Snapshot authentication bypass in grafana KEVCVSS 3.1CRITICAL 9.8
TI-2021-19604 Grafana path traversal KEVCVSS 3.1HIGH 7.5
TI-2024-08600 Grafana SQL Expressions allow for remote code execution CVSS 4.0CRITICAL 9.4
TI-2023-02931 Authentication bypass by spoofing in Grafana CVSS 3.1CRITICAL 9.8
TI-2020-10491 The avatar feature in Grafana 3.0.1 through 7.0.1 has an SSRF Incorrect Access Control… CVSS 3.1HIGH 8.2
TI-2025-03662 Open redirect in Grafana CVSS 3.1HIGH 7.6

See all 174 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences