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VulnerabilityPublished Updated

CVE-2026-49431: FreeBSD · Incorrect Authorization

Affects FreeBSDSource GCVE Database

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Not known to be exploited · CVSS 3.3 Low.

Data as of 9 Nov 2026, 23:24 UTC

CVSS 3.1 base score
3.3Low
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.13.3
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Freebsdfreebsd/freebsdpkg:deb/freebsd/freebsdOther threatsAffected
  • 14.3-RELEASE – 15.1-RELEASE
4 affected builds
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.

References

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