CVE-2026-111269
libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string
libical libical
CVSS
6.9MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.13%Chance of exploitation activity in the next 30 days, higher than 2% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
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.
Text from CVE List
Affected versions 1
- libicalaffected: all versions through 4.0.6CVE List
References 6
- github.com/libical/libical/pull/1455Fixvia CVE List
- github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8deFixvia CVE List
- vulncheck.com/advisories/libical-through-4.0.6-heap-out-of-bounds-read-via-icalvalue-decode-ical-stringAdvisoryvia CVE List
- hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-readReferencevia CVE List
- github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libical/icalvalue.c#L1608-L1645Referencevia CVE List
- github.com/libical/libicalReferencevia CVE List