CVE-2026-48779: ws: Memory exhaustion DoS from tiny fragments and data chunks

highCVSS 7.5CVE-2026-48779

CSIRTS triage

vendor: ws product: ws Denial of service

What: Memory exhaustion can occur from tiny fragments and data chunks, leading to denial of service.
Who is affected: Deployments using the affected ws library.
Urgency: Remediation is high urgency due to the potential for service disruption.
Action: Update to the latest version of the ws library.

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

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48779

Exploitation outlook

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-2026-487790.78% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-48779	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highGHSA-96hv-2xvq-fx4p: ws: Memory exhaustion DoS from tiny fragments and data chunksghsa

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