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Vulnerabilities

Vulnerability · CVE-2026-111269

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.

Published Oct 15, 2026 · catalog updated Oct 17, 2026 · libical through 4.0.6 contains

Check if you run it

No confirmed exploitation is on record for CVE-2026-111269. EPSS is 0.13%. Act only if a listed version of libical through 4.0.6 contains is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (libical through 4.0.6 contains).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.13%
Remediation
Advisory link
Affected products
Debian:12 libical3 · Debian:13 libical3 · Debian:14 libical3

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 libical33.0.16-1, 3.0.17-1, 3.0.17-1.1
  • Debian:13 libical33.0.20-1, 3.0.20-2, 3.0.20-3
  • Debian:14 libical33.0.20-1, 3.0.20-2, 3.0.20-3

How to fix CVE-2026-111269

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-111269. EPSS is 0.13%. Act only if a listed version of libical through 4.0.6 contains is installed.

Which versions are affected?

Compare what you have installed with 3.0.16-1, 3.0.17-1, 3.0.17-1.1, 3.0.20-1, 3.0.20-2, 3.0.20-3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-125: Out-of-bounds Read. EPSS 0.13%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 15, 2026 · NIST NVD

    Detected

    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.

  2. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-111269

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-111269

    30-day exploitation probability 0.1%

    first.org
  • NIST NVDVulnerability recordCVE-2026-111269

    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 terminat

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-111269
    osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.