[NEW] [medium] IBM Tivoli Netcool/OMNIbus (Immutable.js): Multiple vulnerabilities enable denial of service

A remote, anonymous attacker can exploit multiple vulnerabilities in IBM Tivoli Netcool/OMNIbus to conduct a denial of service attack.

CSIRTS triage

What: Multiple vulnerabilities in Immutable.js dependency enable denial of service attacks.
Who is affected: IBM Tivoli Netcool/OMNIbus deployments using affected Immutable.js versions.
Urgency: Medium severity denial of service; not currently exploited.
Action: Update Immutable.js dependency to a patched version.

AI-assisted analysis generated from the source advisory — verify against the original.

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EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-598790.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-598800.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.

CVE	CSIRTS overview	External
CVE-2026-59879	coverage & exploitation status	NVD · CVE.org
CVE-2026-59880	coverage & exploitation status	NVD · CVE.org

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.