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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 8.8 variants that address this vulnerability. Users should apply the updates as described in the Red Hat advisory RHSA-2026:1339 and the referenced update article (https://access.redhat.com/articles/11258). No additional mitigation steps are indicated beyond applying the official patches.

Description

A security update for the resource-agents packages in Red Hat Enterprise Linux addresses a vulnerability in urllib3 (CVE-2025-66418) that involves an unbounded decompression chain leading to resource exhaustion. The resource-agents provide scripts for high-availability service managers such as Pacemaker and RGManager. This vulnerability could impact systems using these packages in high-availability environments. Red Hat has released updated packages for Red Hat Enterprise Linux 8.8 variants to fix this issue.

References

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