{"id":"CVE-2026-111269","summary":"libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string","details":"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.","modified":"2026-10-16T10:46:01.137685735Z","published":"2026-10-15T21:43:16.966Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111269.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111269.json"},{"type":"PACKAGE","url":"https://github.com/libical/libical"},{"type":"ARTICLE","url":"https://github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libical/icalvalue.c#L1608-L1645"},{"type":"FIX","url":"https://github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8de"},{"type":"FIX","url":"https://github.com/libical/libical/pull/1455"},{"type":"ARTICLE","url":"https://hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-read"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111269"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/libical-through-4.0.6-heap-out-of-bounds-read-via-icalvalue-decode-ical-string"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libical/libical","events":[{"introduced":"0"},{"last_affected":"9cfca65c122fa23b9680a28e0c9225a2fd015fc5"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"4.0.6"}],"source":"AFFECTED_FIELD"}}],"versions":["v4.0.6","v4.0.5","v4.0.4","v4.0.3","v4.0.2","v4.0.1","v4.0.0","cyruslibs-fastmail-v61","cyruslibs-fastmail-v60","cyruslibs-fastmail-v59","v3.0.1","v3.0.0","v2.0.0","v1.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111269.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}