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CVE-2026-42127VulnerabilityPublished Updated

Red Hat Security Advisory: grafana security update

Affects Red Hat grafanaSource GCVE Database

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Authoritative record:CVE-2026-42127· High 7.5

Not known to be exploited · CVSS 7.5 High.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
GrafanaGrafana EnterpriseAffected
  • >=11.6.0 <=11.6.14
  • >=12.2.0 <=12.2.8
  • >=12.3.0 <=12.3.6
  • >=12.4.0 <=12.4.3
  • >=13.0.0 <=13.0.1
Fixed in–
GrafanaGrafana OSSAffected
  • >=11.6.0 <=11.6.14
  • >=12.2.0 <=12.2.8
  • >=12.3.0 <=12.3.6
  • >=12.4.0 <=12.4.3
  • >=13.0.0 <=13.0.1
Fixed in–

AI-suggested

A security update addressing this vulnerability is available from Red Hat. Users should apply the updated Grafana packages (version 10.2.6-23.el9_8.1) for Red Hat Enterprise Linux 9 as described in Red Hat advisory RHSA-2026:54184 and the referenced article https://access.redhat.com/articles/11258. Applying this update mitigates the vulnerability. No additional mitigation steps are indicated by the vendor.

Description

A denial of service vulnerability (CVE-2026-42127) exists in Grafana distributed with Red Hat Enterprise Linux 9. The issue is caused by excessive memory allocation triggered by large JSON payloads. Red Hat has released a security update to address this vulnerability. The update is rated as important by Red Hat Product Security. No known exploits are reported in the wild.

References

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