7.5

CVE-2026-29785: linuxfoundation nats-server NULL Pointer Dereference

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2026-29785DEBIAN-CVE-2026-29785CGA-257v-g5h3-wvj8
Published 25-03-2026Last modified 09-09-2026
Open JSON

Vulnerability summary

CVE-2026-29785 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linuxfoundation nats-server. EPSS estimates a 0.97% chance of exploitation in the next 30 days, higher than 61.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.97%
0%100%
Low · +0.32 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 3
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:1135-1CGA-H2H5-63C6-272R

Timeline

  1. 25-03-2026
    PublishedVulnerability first disclosed.
  2. 09-09-2026
    Last modifiedVulnerability information updated.

Description

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.14 and 2.12.5, if the nats-server has the "leafnode" configuration enabled (not default), then anyone who can connect can crash the nats-server by triggering a panic. This happens pre-authentication and requires that compression be enabled (which it is, by default, when leafnodes are used). Versions 2.11.14 and 2.12.5 contain a fix. As a workaround, disable compression on the leafnode port.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.97%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

+0.32 pp

From 0.66% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.97%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard27 products
  • k3s< 1.35.2.1-r3
  • k3s-1.32< 1.32.13.1-r5
  • k3s-1.33< 1.33.9.1-r5
  • k3s-static< 1.35.2.1-r3
  • k3s-static-1.32< 1.32.13.1-r5
Wolfi11 products
  • k3s< 1.35.2.1-r3
  • k3s-1.32< 1.32.13.1-r5
  • k3s-1.33< 1.33.9.1-r5
  • k3s-static< 1.35.2.1-r3
  • k3s-static-1.32< 1.32.13.1-r5
Debian1 product
  • nats-serverAll versions (No fix recorded) | < 2.12.6-1
Github.com/nats-io1 product
  • nats-serverAll versions (No fix recorded)
Github.com/nats-io/nats-server1 product
  • v2< 2.11.14 | ≥ 2.12.0-RC.1, < 2.12.5
Linuxfoundation1 product
Nats-io1 product
Ubuntu1 product
  • nats-serverAll versions (No fix recorded)

8 vendors · 44 products

References

15 links
Show all 15 references