CVE-2026-57053
It was discovered that Libidn incorrectly handled certain internationalized domain name strings. An attacker could possibly use this issue to obtain sensitive information or cause a denial of service.
CSIRTS triage
- What
- Libidn incorrectly handles certain internationalized domain name strings, which can lead to information disclosure or denial of service.
- Who is affected
- Deployments of Libidn that process internationalized domain names are affected.
- Urgency
- Remediation is urgent as it can lead to sensitive information exposure or service disruption.
- Action
- Update to the latest version of Libidn to address this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Advisory coverage (1)
- unknownUSN-8521-1: Libidn vulnerabilityubuntu · 2026-07-09
External references
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[](https://www.csirts.com/cve/CVE-2026-57053)