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CVE-2026-116591VulnerabilityPublished

Red Hat Security Advisory: grafana-pcp security update

Affects Red Hat grafana-pcpSource GCVE Database

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Authoritative record:CVE-2026-116591· High 8.7

Not known to be exploited · CVSS 8.7 High : upgrade the Red Hat redhat/grafana-pcp package to 9.8.3 soon.

Data as of 12 Nov 2026, 03:51 UTC

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 4.08.7
Patch
Available – fixed in 9.8.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Oct 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 11 Nov 2026.

What to do

Upgrade the Red Hat redhat/grafana-pcp package to 9.8.3.

Affected software

ProductAffectedFixed in
Red Hatredhat/grafana-pcppkg:rpm/redhat/grafana-pcpOther threatsAffected
  • >=9.8 <9.8.3
Fixed in
  • 9.8.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated packages for grafana-pcp in Red Hat Enterprise Linux 9.8 Extended Update Support that fix this vulnerability. Users should apply the provided security update (version 5.1.1-17.el9_8.3) for their respective architectures as soon as possible. Refer to the Red Hat advisory RHSA-2026:99152 and the update instructions at https://access.redhat.com/articles/11258 for detailed remediation steps.

Description

A security vulnerability (CVE-2026-116591) affecting the Grafana plugin for Performance Co-Pilot in Red Hat Enterprise Linux 9.8 Extended Update Support has been addressed. The issue involves a denial of service (DoS) caused by crafted zstd compressed input in the klauspost/compress library. Red Hat has issued an important security update to fix this vulnerability in the grafana-pcp package for multiple architectures. The update is available and should be applied to affected systems.

References

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