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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 27 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 an official update for pcs (version 0.11.10-1.el9_7.3) that fixes CVE-2026-4800. Users of affected Red Hat Enterprise Linux 9 High Availability and Resilient Storage variants should apply this update promptly. Detailed instructions are available in the Red Hat advisory and knowledge base article. No additional mitigation steps are indicated beyond applying the official patch.

Description

A security update for the pcs packages in Red Hat Enterprise Linux addresses a vulnerability in lodash (CVE-2026-4800) that allows arbitrary code execution via untrusted input in template imports. The pcs packages are command-line tools for configuring Pacemaker and Corosync utilities. Red Hat has rated this update as Important and released fixes for multiple Red Hat Enterprise Linux 9 variants. No CVSS score is provided in the advisory.

References

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