CVE-2026-116743

MEDIUM 5.5

libyal libmsiecf through 20260525 Double Free via libmsiecf_url_values_read_data

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-415
Vendor	libyal
Product	libmsiecf
Published	Oct 26, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

libyal / libmsiecf

0 ≤ 20260525

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/libyal/libmsiecf/issues/6 github.com: https://github.com/libyal/libmsiecf github.com: https://github.com/libyal/libmsiecf/commit/a99a703d190d62f6c21b6225cf84ce80037e45d5 github.com: https://github.com/libyal/libmsiecf/blob/20260525/libmsiecf/libmsiecf_url_values.c#L824 hackmd.io: https://hackmd.io/@haindpwn/libmsiecf-url-record-partial-recovery-double-free vulncheck.com: https://www.vulncheck.com/advisories/libyal-libmsiecf-through-20260525-double-free-via-libmsiecf-url-values-read-data

Credits

HaiND from the Post and Telecommunication Institute of Technology