CVE-2026-114198 PUBLISHED

Deserialization of untrusted data in floss

Assigner: Mandiant
Reserved: 21.10.2026 Published: 21.10.2026 Updated: 21.10.2026

Deserialization of untrusted data in Mandiant FLARE floss releases before 3.2.0 allows arbitrary code execution when a crafted .viv or .exe.viv workspace is passed to the floss utility

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	High
Attack Complexity	High	Integrity	High	Integrity	High
Attack Requirements	Present	Availability	High	Availability	High
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	Mandiant FLARE
Product	floss
Versions	Default: unaffected affected from 0 to 3.2.0 (excl.)

References

https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0036.md

Problem Types

CWE-502: Deserialization of Untrusted Data CWE

Impacts

CAPEC-586: Object Injection