CVE-2026-44839: RabbitMQ: Unsanitized vhost names allow for XSS in management UI

unknownCVE-2026-44839

CSIRTS triage

vendor: RabbitMQ product: RabbitMQ Cross-site scripting

What: Unsanitized vhost names allow cross-site scripting (XSS) attacks in the management UI.
Who is affected: RabbitMQ deployments with untrusted users able to create or modify vhost names are affected.
Urgency: Medium urgency; XSS in the management UI requires authenticated access or UI-level exploitation.
Action: Update RabbitMQ to a version containing vhost name sanitization.

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: unknown
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44839

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-2026-448390.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-44839	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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