CVE-2026-111269

Medium

Description

libical through 4.0.6 contains a heap-based out-of-bounds read in icalvalue_decode_ical_string() in src/libical/icalvalue.c when decoding input ending in a backslash. Attackers can supply escaped iCalendar text with a trailing backslash, causing the loop to read past the terminator and crash the application or leak adjacent heap memory.

SeverityMedium

CVSS6.1

Exploit probability—

Product

Microsoft Azl3 Libical

PublishedOct 15, 2026

First seenOct 15, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Patches

github.com/libical/libical/pull/1455
github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8de

Affected products

Product	Affected versions	Fixed in
microsoft azl3_libical_3.0.10-1	No range specified	—
microsoft azl3_libical_3.0.10-3	No range specified	—

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