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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 Red Hat grafana-pcp to 1.20.2 soon.

Data as of 12 Nov 2026, 08:06 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 1.20.2
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 compress to 1.20.2.

Affected software

ProductAffectedFixed in
klauspostcompressAffected
  • <1.20.2
Fixed in
  • 1.20.2

AI-suggested

Red Hat has released an updated package for grafana-pcp (version 5.1.1-17.el9_9.4) for Red Hat Enterprise Linux 9 on multiple architectures. Applying this official update will remediate the vulnerability. Refer to Red Hat's advisory and update instructions at https://access.redhat.com/articles/11258 for detailed guidance.

Description

A security vulnerability (CVE-2026-116591) affecting the Grafana plugin for Performance Co-Pilot in Red Hat Enterprise Linux 9 allows denial of service via crafted zstd compressed input. This issue is related to the klauspost/compress library used for zstd compression. Red Hat has issued an important security update to address this vulnerability.

References

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