CVE-2025-4922VulnerabilityPublished 11 Jun 2025

CVE-2025-4922: HashiCorp Nomad · Incorrect Privilege Assignment

Affects HashiCorp NomadSource CVE Database V5

Not known to be exploited · CVSS 8.1 High · fixed in 1.10.2 : patch HashiCorp Nomad soon.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

8.1High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.5% chance of exploitation in 30 days – higher than 43% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.10.2, 1.9.10, 1.8.14

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade HashiCorp Nomad to 1.10.2, 1.9.10 or 1.8.14.

Affected software

Product	Affected	Fixed in
HashiCorp Nomad	Affected =1.4.0 <1.8.14 <1.9.10 <1.10.2	Fixed in 1.8.14 1.9.10 1.10.2

AI-suggested

To mitigate CVE-2025-4922, European organizations should immediately upgrade affected Nomad installations to the patched versions: Nomad Community Edition 1.10.2 or later, and Nomad Enterprise 1.10.2, 1.9.10, or 1.8.14 or later. Beyond patching, organizations should audit their ACL policies to identify and correct any overlapping or ambiguous prefix rules that could cause shadowing or unintended privilege grants. Implement strict role-based access controls with the principle of least privilege to limit the impact of any potential privilege escalation. Regularly review and test ACL configurations using automated tools or scripts to detect policy conflicts. Network segmentation and monitoring should be enhanced to detect anomalous access patterns to Nomad servers. Employ logging and alerting on ACL-related events to quickly identify suspicious privilege changes. Finally, conduct security awareness and training for administrators managing Nomad ACLs to prevent misconfigurations that could exacerbate this vulnerability.

Description

Nomad Community and Nomad Enterprise (“Nomad”) prefix-based ACL policy lookup can lead to incorrect rule application and shadowing. This vulnerability, identified as CVE-2025-4922, is fixed in Nomad Community Edition 1.10.2 and Nomad Enterprise 1.10.2, 1.9.10, and 1.8.14.

Impact

For European organizations, the impact of CVE-2025-4922 can be substantial, especially those relying on HashiCorp Nomad for critical workload orchestration in cloud-native or hybrid environments. Unauthorized privilege escalation could lead to unauthorized access to sensitive application deployments, manipulation of workload scheduling, and potential exposure or tampering of confidential data. This could disrupt business operations, violate data protection regulations such as GDPR, and damage organizational reputation. Given Nomad's role in managing distributed applications, exploitation could also facilitate lateral movement within networks, increasing the risk of broader compromise. The vulnerability's network-based attack vector and lack of user interaction requirement make it easier for attackers to exploit remotely once they have low-level access, increasing the threat surface. European organizations in sectors such as finance, telecommunications, and critical infrastructure, which often use Nomad for scalable and resilient application deployment, are particularly at risk. Additionally, compliance requirements in Europe mandate strict access controls and incident response, so failure to address this vulnerability could result in regulatory penalties.

CWE-266Incorrect Privilege Assignment (opens in a new tab)
Base weaknessOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.
Architecture and Design · Operation
Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Architecture and Design · Operation · Environment Hardening
Run your code using the lowest privileges that are required to accomplish the necessary tasks. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment.
OWASP Cheat Sheets
Docker Security (opens in a new tab)
Third Party Javascript Management (opens in a new tab)
Virtual Patching (opens in a new tab)
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V1.4.4 (opens in a new tab)
V1.4.5 (opens in a new tab)
V1.10.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

discuss.hashicorp.com/t/hcsec-2025-12-nomad-vulnerable-to-incorrect-acl-policy-lookup-attached-to-a-job/75396 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 12 Jul 2025, 07:01 UTC

WeaknessesCWE-266

Technical details

References

Community reviews

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