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CVE-2025-66418VulnerabilityPublished Updated

Red Hat Security Advisory: resource-agents security update

Affects Red Hat resource-agentsSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 20:52 UTC

Severity
High

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

EPSS
0.6% chance of exploitation in 30 days – higher than 52% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Jan 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 30 Oct 2026.

What to do

AI-suggested

Red Hat has released updated resource-agents packages for Red Hat Enterprise Linux 8.4 High Availability that address this vulnerability. Users should apply the security update as described in the Red Hat advisory RHSA-2026:1338 and the referenced article https://access.redhat.com/articles/11258 to remediate the issue. No additional mitigation steps are indicated beyond applying the official update.

Description

A security update for the resource-agents packages in Red Hat Enterprise Linux addresses a vulnerability in urllib3 (CVE-2025-66418) involving an unbounded decompression chain that can lead to resource exhaustion. The resource-agents provide scripts for high-availability service managers like Pacemaker and RGManager. This vulnerability could impact systems running Red Hat Enterprise Linux High Availability 8.4. Red Hat has released updated packages to fix this issue.

References

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