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.
History

Mon, 26 Oct 2026 16:30:00 +0000


Mon, 26 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 17 Oct 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Libical
Libical libical
Vendors & Products Libical
Libical libical

Fri, 16 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 15 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
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.
Title libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string
First Time appeared Libical Project
Libical Project libical
Weaknesses CWE-125
CPEs cpe:2.3:a:libical_project:libical:*:*:*:*:*:*:*:*
Vendors & Products Libical Project
Libical Project libical
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-15T21:43:16.966Z

Updated: 2026-10-26T14:15:58.734Z

Reserved: 2026-10-15T19:33:18.967Z

Link: CVE-2026-111269

cve-icon Vulnrichment

Updated: 2026-10-26T13:52:40.328Z

cve-icon NVD

Status : Deferred

Published: 2026-10-15T22:19:27.680

Modified: 2026-10-26T15:16:37.927

Link: CVE-2026-111269

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-15T21:43:16Z

Links: CVE-2026-111269 - Bugzilla