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CVE-2026-4800VulnerabilityPublished Updated

Red Hat Security Advisory: pcs security update

Affects Red Hat pcsSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 11:52 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
2.8% chance of exploitation in 30 days – higher than 86% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  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), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

AI-suggested

Red Hat has released updated pcs packages for Red Hat Enterprise Linux 9.6 Extended Update Support that address this vulnerability. Users should apply the provided security update as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate the issue. No additional mitigation steps are indicated beyond applying the official patch.

Description

A security vulnerability (CVE-2026-4800) affecting the pcs packages used for configuring Pacemaker and Corosync utilities has been identified. The issue involves lodash, a JavaScript utility library, where arbitrary code execution can occur via untrusted input in template imports. Red Hat has issued an important security update for Red Hat Enterprise Linux 9.6 Extended Update Support to address this vulnerability.

References

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