CVE-2026-42582
high
CVSS v3
7.5
CVSS v4 NEW
—
VIR risk
7.5
Description
Netty HTTP/3 QPACK literal unbounded allocation
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-http3 | <4.2.13.Final | 4.2.13.Final |
| MAVEN | io.netty:netty-codec-http3 | <= 4.2.12.Final | 4.2.13.Final |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| netty | netty | {"endExcluding":"4.2.13"} | 4.2.13 |
References
- https://github.com/netty/netty/security/advisories/GHSA-2c5c-chwr-9hqw
- https://nvd.nist.gov/vuln/detail/CVE-2026-42582
- https://github.com/netty/netty
- https://www.suse.com/security/cve/CVE-2026-42582.html
- https://security-tracker.debian.org/tracker/CVE-2026-42582
- https://github.com/advisories/GHSA-2c5c-chwr-9hqw
CWEs
CWE-770 CWE-789
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.