CVE-2026-111269
mediumlibical 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 bac…
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.
CVSS
6.1
6.1 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-10-15 22:19
Modified: 2026-10-26 15:16
NVD status: Deferred
Last synced 1 day ago
Verified against the source API 2026-10-27 07:03 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/libical/libical disclosure@vulncheck.com
- https://github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libic... disclosure@vulncheck.com
- https://github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8de disclosure@vulncheck.com
- https://github.com/libical/libical/pull/1455 disclosure@vulncheck.com
- https://hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-read disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/libical-through-4.0.6-heap-out-of-bounds-read-via-ica... disclosure@vulncheck.com
- https://hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-read 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:03 UTC · record ↗