Vulnerability · Published Oct 21, 2026 · Assigned by Mandiant
CVE-2026-114198Deserialization of untrusted data in floss
High 8.7
In plain English
A high-severity unsafe deserialization in floss from Mandiant FLARE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.2%top 95.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mandiant FLARE | floss | 0 – before 3.2.0 |
Weakness: CWE-502 · 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