7.5

CVE-2026-21729: grafana loki

CVSS: 7.5v3.1HighAwaiting analysis
Published 16-07-2026Last modified 27-08-2026
Open JSON

Vulnerability summary

CVE-2026-21729 is a high (CVSS 7.5) vulnerability in grafana loki. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.46%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
RHSA-2026:72570

Timeline

  1. 16-07-2026
    PublishedVulnerability first disclosed.
  2. 27-08-2026
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

0.00 pp

From 0.46% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Grafana1 product
  • loki≥ v3.0.0, < v3.7.0

1 vendor · 1 product

References

1 links