CVE-2016-5826: The parser_get_next_char function in libical 0.47 and 1.0 allows remote attackers to cause a denial of serv...

Security readout for executives and security teams

CVE-2016-5826 is a denial-of-service issue in libical 0.47 and 1.0. A crafted string sent into the library’s parser can trigger an out-of-bounds heap read and crash affected software. There is no source evidence of active exploitation, data theft, or code execution. Exposure is likely where applications embed libical 0.47 or 1.0 and parse attacker-controlled calendar strings. Bundled library copies may be overlooked. The source bundle does not identify specific operating systems, applications, or packages that shipped vulnerable versions. Treat as a service-availability risk, not a confirmed breach risk. Prioritize internet-facing or customer-facing systems that parse calendar data. Because sources do not provide a CVSS score or active exploitation evidence, handle through normal vulnerability remediation unless a critical business service is exposed. Mitigation focus: Inventory applications and packages using libical 0.47 or 1.0.; Check libical and application vendor guidance for fixed versions or patches.; Prioritize services parsing untrusted calendar data or user-supplied strings..

Prepared

Jun 13, 2026, 12:10 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.