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CVE-2026-59939VulnerabilityPublished Updated

Red Hat Security Advisory: fence-agents security update

Affects Red Hat fence-agentsSource GCVE Database

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Not known to be exploited.

Data as of 31 Oct 2026, 20:20 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 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Jul 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 31 Oct 2026.

What to do

AI-suggested

Red Hat has released updated fence-agents packages for Red Hat Enterprise Linux 8.6 to address this vulnerability. Users should apply the official security update as described in the Red Hat advisory RHSA-2026:48604. No additional mitigation steps are indicated beyond applying the update.

Description

A denial of service vulnerability (CVE-2026-59939) affecting the httplib2 library used by fence-agents in Red Hat Enterprise Linux 8.6 allows unbounded decompression of HTTP response bodies. Fence-agents are scripts for remote power management in clusters, enabling forced restart and removal of failed nodes. This security issue can cause denial of service conditions. Red Hat has issued an important security update to address this vulnerability in fence-agents packages for RHEL 8.6.

References

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