CVE-2026-111269
libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-125 |
| Vendor | libical |
| Product | libical |
| Published | Oct 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Affected Versions
libical / libical
0 ≤ 4.0.6
References
hackmd.io: https://hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-read github.com: https://github.com/libical/libical/pull/1455 github.com: https://github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8de github.com: https://github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libical/icalvalue.c#L1608-L1645 github.com: https://github.com/libical/libical vulncheck.com: https://www.vulncheck.com/advisories/libical-through-4.0.6-heap-out-of-bounds-read-via-icalvalue-decode-ical-string
Credits
alepacheco HaiND from the Post and Telecommunication Institute of Technology