CVE-2026-48480 OHttpVersionChunkDraft: Missing Final-Chunk Enforcement Leads to Undetected Stream Truncation
An on-path attacker can truncate OHTTP streams without detection, allowing silent data loss or bypassing integrity checks in applications using the Netty OHTTP codec.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48480?
CVE-2026-48480 is a medium-severity vulnerability in netty-incubator-codec-ohttp, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The netty incubator codec.bhttp is a java language binary http parser. Prior to version 0.0.22.FInal, the codec-ohttp implementation of draft-ietf-ohai-chunked-ohttp does not verify that a cryptographically-signed final chunk was received before the outer HTTP body terminates. An on-path adversary (the OHTTP relay itself, or any MITM on the relay↔gateway or relay↔client transport) can forward a prefix of a legitimate chunked-OHTTP message—cut at a non-final chunk boundary—and close the outer body cleanly, producing no decryption error and no exception in the receiving application. Version 0.0.22.Final fixes the issue.
Weakness: CWE-325
Which versions are affected by CVE-2026-48480?
2 open source packages ship an affected version, including io.netty.incubator:netty-incubator-codec-ohttp.
| Package | Affected | Fixed in |
|---|---|---|
io.netty.incubator:netty-incubator-codec-ohttp Maven | All versions | 0.0.22.Final |
io.netty.incubator:netty-incubator-codec-ohttp Maven | All versions | 0.0.22.Final |
How do I fix CVE-2026-48480?
Upgrade io.netty.incubator:netty-incubator-codec-ohttp to 0.0.22.Final or later.
Is CVE-2026-48480 being exploited?
There is no known exploitation of CVE-2026-48480 in the wild and no public exploit code.
Sources
Also known as GHSA-r6fj-869h-4f6q.