CVE-2026-116743

medium

Description

libyal libmsiecf through 20260525 contains a double free vulnerability in libmsiecf_url_values_read_data() that allows attackers to corrupt heap memory via crafted partial URL records. Attackers can supply a crafted MSIE cache index.dat file whose recovered partial record has an oversized unknown_offset, crashing forensic tools processing it.

References

https://www.vulncheck.com/advisories/libyal-libmsiecf-through-20260525-double-free-via-libmsiecf-url-values-read-data

https://hackmd.io/@haindpwn/libmsiecf-url-record-partial-recovery-double-free

https://github.com/libyal/libmsiecf/issues/6

https://github.com/libyal/libmsiecf/commit/a99a703d190d62f6c21b6225cf84ce80037e45d5

https://github.com/libyal/libmsiecf/blob/20260525/libmsiecf/libmsiecf_url_values.c#L824

https://github.com/libyal/libmsiecf

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-110491

Details

Source: Mitre, NVD

Published: 2026-10-26

Updated: 2026-10-27

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 6.8

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00127