How severe is CVE-2026-61827?

No CVSS score has been assigned to CVE-2026-61827 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-61827?

CVE-2026-61827 affects the following packages: io.netty.incubator:netty-incubator-codec-bhttp (Maven). Ecosystems affected: Maven.

How do I fix CVE-2026-61827?

Update io.netty.incubator:netty-incubator-codec-bhttp to 0.0.23.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-61827 is resolved across your whole dependency graph.

How do I detect CVE-2026-61827 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.netty.incubator:netty-incubator-codec-bhttp, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-61827 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2026-61827 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-61827 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was CVE-2026-61827 published, and has it been updated?

CVE-2026-61827 was published on August 20, 2026 and was last updated on August 20, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

CVE-2026-61827 — netty-incubator-codec-bht…

CVE-2026-61827 is a security vulnerability in io.netty.incubator:netty-incubator-codec-bhttp. A fix is available for io.netty.incubator:netty-incubator-codec-bhttp — see the affected versions and patch details below.

netty-incubator-codec-ohttp: BinaryHttpParser should enforce limits for variable lengths fields

Published

Aug 20, 2026

Updated

Aug 20, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Aug 20, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

☕io.netty.incubator:netty-incubator-codec-bhttp

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

We don't enforce any limits for the encoded variable lengths that are used for fields. As the remote peer controls these it's easy for the remote peer to have us buffer data forever and so ultimately OOM.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`io.netty.incubator:netty-incubator-codec-bhttp`	all versions	0.0.23.Final`io.netty.incubator:netty-incubator-codec-bhttp:0.0.23.Final`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.netty.incubator:netty-incubator-codec-bhttp, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update io.netty.incubator:netty-incubator-codec-bhttp to 0.0.23.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-61827 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2026-61827 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works