CVE-2026-42587
high
CVSS v3
7.5
CVSS v4 NEW
—
VIR risk
7.5
Description
Netty: HttpContentDecompressor maxAllocation bypass when Content-Encoding set to br/zstd/snappy leads to decompression bomb DoS
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
Debian Affected 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Affected | — |
| forky | Affected | — |
| bullseye | Affected | — |
| bookworm | Affected | — |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | io.netty:netty-codec-http | >=4.2.0.Alpha1,<4.2.13.Final | 4.2.13.Final |
| Maven | io.netty:netty-codec-http2 | >=4.2.0.Alpha1,<4.2.13.Final | 4.2.13.Final |
| Maven | io.netty:netty-codec-http | <4.1.133.Final | 4.1.133.Final |
| Maven | io.netty:netty-codec-http2 | <4.1.133.Final | 4.1.133.Final |
| MAVEN | io.netty:netty-codec-http2 | <= 4.1.132.Final | 4.1.133.Final |
| MAVEN | io.netty:netty-codec-http | <= 4.1.132.Final | 4.1.133.Final |
| MAVEN | io.netty:netty-codec-http2 | >= 4.2.0.Alpha1, <= 4.2.12.Final | 4.2.13.Final |
| MAVEN | io.netty:netty-codec-http | >= 4.2.0.Alpha1, <= 4.2.12.Final | 4.2.13.Final |
References
- https://github.com/netty/netty/security/advisories/GHSA-f6hv-jmp6-3vwv
- https://nvd.nist.gov/vuln/detail/CVE-2026-42587
- https://github.com/netty/netty
- https://www.suse.com/security/cve/CVE-2026-42587.html
- https://security-tracker.debian.org/tracker/CVE-2026-42587
- https://github.com/advisories/GHSA-f6hv-jmp6-3vwv
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.