CVE-2026-49431: FreeBSD · Incorrect Authorization
Affects FreeBSDSource GCVE Database
Not known to be exploited · CVSS 3.3 Low.
Data as of 9 Nov 2026, 23:24 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 3.3 |
|---|
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 19 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Freebsdfreebsd/freebsdpkg:deb/freebsd/freebsdOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, restrict local user access to trusted users only to mitigate unauthorized metadata modification.
Description
CVE-2026-49431 is an authorization vulnerability in FreeBSD's ZFS implementation. The ZFS_IOC_SET_PROP ioctl call, used by the zfs-set utility, improperly validates user privileges, allowing any local user with limited privileges to set an internal ZFS metadata flag "$hasrecvd" on datasets. This flag indicates that the dataset has received properties from a zfs-recv stream. The vulnerability affects FreeBSD versions 14.3-RELEASE, 14.4-RELEASE, 15.0-RELEASE, and 15.1-RELEASE.