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CVE Record

CVE-2022-29946: NATS.io NATS Server before 2.8.2 and Streaming Server before 0.24.6 could allow a remote attacker to bypass...

NATS.io NATS Server before 2.8.2 and Streaming Server before 0.24.6 could allow a remote attacker to bypass security restrictions, caused by the failure to enforce negative user permissions in one scenario. By using a queue subscription on the wildcard, an attacker could exploit this vulnerability to allow denied subjects.

MediumCVSS 6.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Some older NATS messaging servers may let an authenticated user receive messages they were explicitly denied. This weakens access controls inside message-driven systems and could expose or alter limited data flows, depending on how NATS subjects are used.

Executive priority

Treat as a moderate-priority access-control fix. Prioritize quickly if NATS carries sensitive business events, customer data, operational commands, or supports multiple teams or tenants with different access rights.

Technical view

NATS Server before 2.8.2 and Streaming Server before 0.24.6 failed to enforce negative user permissions in one scenario. The CVE describes queue subscriptions involving wildcards allowing denied subjects. CVSS 3.1 is 6.3: network reachable, low complexity, low privileges required, no user interaction.

Likely exposure

Exposure is most likely where affected NATS versions are deployed with authenticated users, deny permissions, and subject-based separation between tenants, services, or data classes. The bundle does not provide CPEs or deployment-specific affected package metadata.

Exploitation context

The bundle does not cite active exploitation, and KEV is false. Exploitation requires a remote user with valid low-privileged access, so risk is higher in shared, partner-accessible, or multi-tenant messaging environments.

Researcher notes

The public bundle identifies the vulnerable behavior and fixed version thresholds but omits CWE, CPEs, detailed affected package metadata, and exploitation evidence. Validation should focus on version confirmation and whether deny permissions are security-critical in the deployment.

Mitigation direction

  • Upgrade NATS Server to 2.8.2 or later.
  • Upgrade NATS Streaming Server to 0.24.6 or later.
  • Review NATS advisory and vendor guidance for configuration-specific notes.
  • Restrict NATS access to trusted networks and authenticated principals.
  • Audit deny-based subject permissions in shared environments.

Validation and detection

  • Inventory deployed NATS Server and Streaming Server versions.
  • Confirm no instance runs below 2.8.2 or 0.24.6 respectively.
  • Review account and user permission models for deny rules.
  • Check whether NATS subjects separate sensitive services or tenants.
  • Review logs for unexpected access to denied subject areas.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-29946 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.3 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L2.83.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.3Medium
CVSS 3.1 vector shape for CVE-2022-29946Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.