{"id":"CVE-2026-111269","title":"libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string","summary":"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,…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","cvssSource":"cna","cwe":["CWE-125"],"vendor":"libical","product":"libical","affected":["libical <= 4.0.6"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-26T13:52:54.942387Z"},"exploitAvailable":true,"published":"2026-10-15","updated":"2026-10-26","sourceUpdated":"2026-10-26T14:15:58.734Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111269","references":[{"url":"https://hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-read"},{"url":"https://github.com/libical/libical/pull/1455"},{"url":"https://github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8de"},{"url":"https://github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libical/icalvalue.c#L1608-L1645"},{"url":"https://github.com/libical/libical"},{"url":"https://www.vulncheck.com/advisories/libical-through-4.0.6-heap-out-of-bounds-read-via-icalvalue-decode-ical-string","label":"VulnCheck Advisory: libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_string"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111269.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-111269"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553858"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-111269"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111269"}],"tags":["cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.00127,"epssPercentile":0.02346,"ingestedAt":"2026-10-15T22:48:25.446Z","slug":"CVE-2026-111269","body":"## Overview\n\nlibical 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.\n\n## Affected\n\n- `libical <= 4.0.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111269.json)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":229576,"id":"CVE-2026-111269","ts":1793024894169,"field":"exploit_available","old":"false","new":"true"}]}