Red Hat Security Advisory: pcs security update
Affects Red Hat pcsSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 11:52 UTC
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
Disclosed: evidence found.
CVE published 29 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 that address this vulnerability. Users of affected Red Hat Enterprise Linux 9.4 variants should apply the security updates as detailed in the Red Hat advisory RHSA-2026:11516. The vendor advisory provides instructions for applying these updates. No additional mitigation steps are indicated beyond applying the official patches.
Description
A security vulnerability (CVE-2026-4800) affecting the pcs packages used for configuring Pacemaker and Corosync utilities has been identified. The flaw involves arbitrary code execution via untrusted input in lodash template imports. Red Hat has issued an important security advisory and provided updates to address this issue in Red Hat Enterprise Linux 9.4 variants. The vulnerability is rated with high severity by the source, but no CVSS score is provided in the advisory.