VulnSocial

CVE-2026-33248Patch(linuxfoundation / nats-server)

LOWCVSS 4.2 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch linuxfoundation nats-server systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

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, when using mTLS for client identity, with `verify_and_map` to derive a NATS identity from the client certificate's Subject DN, certain patterns of RDN would not be correctly enforced, allowing for authentication bypass. This does require a valid certificate from a CA already trusted for client certificates, and `DN` naming patterns which the NATS maintainers consider highly unlikely. So this is an unlikely attack. Nonetheless, administrators who have been very sophisticated in their `DN` construction patterns might conceivably be impacted. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, developers should review their CA issuing practices.

linuxfoundation CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-287CWE-295

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • nats-server

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
linuxfoundation
Products
nats-server

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-03-25: 1Patch / Workaround · 2026-03-25: 1Technical Details · 2026-03-25: 103-25
Signal classification1 categories
Patch
1100.0%
Referenced assets2 URLs
By indicator
Full discourse1 post
  • CVE@CVEnew
    Patch

    CVE-2026-33248 NATS-Server is a High-Performance server for http://NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using mTLS for client ident… https://www.cve.org/CVERecord?id=CVE-2026-33248

    Post summary

    CVE-2026-33248 is a vulnerability in NATS-Server affecting older versions when using mTLS for client identification, with the issue fixed in releases 2.11.15 and 2.12.6; no exploitation or PoC evidence is provided.

    00000100
    56.8K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Applinuxfoundationnats-server---

Explore more

Back to dashboardlinuxfoundation CVEsnats-server vulnerabilities