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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 · CVSS not yet scored by NVD

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 4 Aug 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 that address this vulnerability. Users of affected Red Hat Enterprise Linux 9 versions should apply the security update as described in the Red Hat advisory RHSA-2026:50317. No additional mitigation steps are indicated beyond applying the official update.

Description

A security update for the fence-agents packages in Red Hat Enterprise Linux 9 addresses a denial of service vulnerability (CVE-2026-59939) in the httplib2 library. The flaw involves unbounded decompression of HTTP response bodies, which could be exploited to cause a denial of service. The fence-agents packages are used for remote power management in cluster environments, allowing failed or unreachable nodes to be forcibly restarted and removed from the cluster. Red Hat has released updated fence-agents packages to fix this issue.

References

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