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CVE-2026-59886VulnerabilityPublished 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, 11:52 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS
0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 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 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 Advanced Update Support and Extended Life Cycle Long Life Add-On. Applying these official updates will remediate the vulnerability. Users should follow Red Hat's guidance on applying these updates as detailed in their advisory and article https://access.redhat.com/articles/11258. No other mitigation or workaround is indicated.

Description

A security update for the resource-agents packages in Red Hat Enterprise Linux addresses a denial of service vulnerability in the pyasn1 library caused by crafted ASN.1 REAL values (CVE-2026-59886). The resource-agents provide scripts for high-availability service managers such as Pacemaker and RGManager. This vulnerability could allow denial of service conditions when processing malicious ASN.1 data. Red Hat has released updated packages for affected Red Hat Enterprise Linux 8.4 High Availability variants to remediate this issue.

References

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