CVE-2021-32575
Improper network isolation in Hashicorp Nomad
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
- Record
CVE-2021-32575- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 3.3 Low
AV:A/AC:L/Au:N/C:N/I:P/A:N - Updated
- 2026-11-02
CVE List No score
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
- Record
CVE-2021-32575- Updated
- 2026-11-02
EUVDEUVD-2021-1409 No score
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
- Record
EUVD-2021-1409- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vf6q-9f2f-mwhv
Improper network isolation in Hashicorp Nomad
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
- Record
GHSA-vf6q-9f2f-mwhv- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-1100
- Updated
- 2026-11-02
OSVALPINE-CVE-2021-32575
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
- Record
ALPINE-CVE-2021-32575- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-03
OSV
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
- Record
CVE-2021-32575- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-vf6q-9f2f-mwhv
Improper network isolation in Hashicorp Nomad
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
- Record
GHSA-vf6q-9f2f-mwhv- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-1100
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-32575
HashiCorp Nomad and Nomad Enterprise up to version 1.0.4 bridge networking mode allows ARP spoofing from other bridged tasks on the same node. Fixed in 0.12.12, 1.0.5, and 1.1.0 RC1.
- Record
UBUNTU-CVE-2021-32575- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVGO-2022-0709 No score
Improper network isolation in Hashicorp Nomad in github.com/hashicorp/nomad
Improper network isolation in Hashicorp Nomad in github.com/hashicorp/nomad
- Record
GO-2022-0709- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/hashicorp/nomadGo |
1.0.0 up to 1.0.5 | 1.0.5 |
github.com/hashicorp/nomadGo |
before 0.12.12 | 0.12.12 |
nomadAlpine:v3.15 |
before 1.1.1-r0 | 1.1.1-r0 |
nomadAlpine:v3.16 |
before 1.1.1-r0 | 1.1.1-r0 |
nomadAlpine:v3.17 |
before 1.1.1-r0 | 1.1.1-r0 |
nomadAlpine:v3.18 |
before 1.1.1-r0 | 1.1.1-r0 |
github.com/hashicorp/nomadGo |
before 0.12.12, 1.0.0 up to 1.0.5 | 0.12.121.0.5 |
nomadUbuntu:18.04:LTS |
All versions, plus listed versions 0.4.0+dfsg-1 |
None known |
nomadUbuntu:20.04:LTS |
All versions, plus listed versions 0.8.7+dfsg1-1ubuntu1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-32575 is a medium vulnerability (CVSS 6.5) in Hashicorp Nomad, published June 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 43rd percentile. Fixed in github.com/hashicorp/nomad 1.0.5.
References
hashicorp.com/blog/category/nomad
discuss.hashicorp.com/t/hcsec-2021-14-nomad-bridge-networking-mode-allows-arp-spoofing-from-other-bridged-tasks-on-same-node/24296
nvd.nist.gov/vuln/detail/CVE-2021-32575
github.com/advisories/GHSA-vf6q-9f2f-mwhv
security.alpinelinux.org/vuln/CVE-2021-32575
ubuntu.com/security/CVE-2021-32575
cve.org/CVERecord?id=CVE-2021-32575