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NVD Vulnerability Details :
CVE-2026-33223
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-25 Mar, 2026 | 21:16
Updated At-26 Mar, 2026 | 17:18

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, the NATS message header `Nats-Request-Info:` is supposed to be a guarantee of identity by the NATS server, but the stripping of this header from inbound messages was not fully effective. An attacker with valid credentials for any regular client interface could thus spoof their identity to services which rely upon this header. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.4MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Primary3.15.4MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 6.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Type: Primary
Version: 3.1
Base score: 5.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CPE Matches
The Linux Foundation
linuxfoundation
>>nats-server>>Versions before 2.11.15(exclusive)
cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*
The Linux Foundation
linuxfoundation
>>nats-server>>Versions from 2.12.0(inclusive) to 2.12.6(exclusive)
cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-290Primarysecurity-advisories@github.com
CWE ID: CWE-290
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://advisories.nats.io/CVE/secnote-2026-09.txtsecurity-advisories@github.com
Vendor Advisory
https://github.com/nats-io/nats-server/security/advisories/GHSA-pwx7-fx9r-hr4hsecurity-advisories@github.com
Vendor Advisory
Hyperlink: https://advisories.nats.io/CVE/secnote-2026-09.txt
Source: security-advisories@github.com
Resource:
Vendor Advisory
Hyperlink: https://github.com/nats-io/nats-server/security/advisories/GHSA-pwx7-fx9r-hr4h
Source: security-advisories@github.com
Resource:
Vendor Advisory
Change History
0Changes found
Details not found