CVE-2026-44248
high
CVSS v3
7.5
CVSS v4 NEW
—
VIR risk
7.5
Description
Netty MQTT: Resource exhaustion in MqttDecoder
Predictions
Exploit likelihood
83%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | affected | |
| debian | sid | affected | |
| debian | trixie | affected | |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | io.netty:netty-codec-mqtt | >=4.2.0.Alpha1,<4.2.13.Final | 4.2.13.Final |
| Maven | io.netty:netty-codec-mqtt | <4.1.133.Final | 4.1.133.Final |
| MAVEN | io.netty:netty-codec-mqtt | <= 4.1.132.Final | 4.1.133.Final |
| MAVEN | io.netty:netty-codec-mqtt | >= 4.2.0.Alpha1, <= 4.2.12.Final | 4.2.13.Final |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| netty | netty | {"endExcluding":"4.1.133"} | 4.1.133 |
References
- https://github.com/netty/netty/security/advisories/GHSA-jfg9-48mv-9qgx
- https://nvd.nist.gov/vuln/detail/CVE-2026-44248
- https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901027
- https://github.com/netty/netty
- https://www.suse.com/security/cve/CVE-2026-44248.html
- https://security-tracker.debian.org/tracker/CVE-2026-44248
- https://github.com/advisories/GHSA-jfg9-48mv-9qgx
CWEs
CWE-400
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.