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High, CVSS 8.7amended

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

CVE-2026-61827GHSA-hmq9-67w8-j5pw

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (io.netty.incubator:netty-incubator-codec-bhttp 0.0.23.Final), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-hmq9-67w8-j5pw

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-hmq9-67w8-j5pw

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-61827

Advisory: netty-incubator-codec-ohttp: BinaryHttpParser should enforce limits for variable lengths fields
IDs: CVE-2026-61827, GHSA-hmq9-67w8-j5pw
Record: https://patchnext.com/advisories/cve-2026-61827 (revision 3, source checked 26 Oct 2026, 16:54 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: io.netty.incubator:netty-incubator-codec-bhttp 0.0.23.Final. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven io.netty.incubator:netty-incubator-codec-bhttp: affected <= 0.0.22.Final; fixed in 0.0.23.Final

## Suggested inspection (read-only)
- Maven io.netty.incubator:netty-incubator-codec-bhttp: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on io.netty.incubator:netty-incubator-codec-bhttp.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-hmq9-67w8-j5pw (OSV record GHSA-hmq9-67w8-j5pw lists affected ranges: Maven io.netty.incubator:netty-incubator-codec-bhttp >=0 <0.0.23.Final (fixed))
- Verified: https://github.com/advisories/GHSA-hmq9-67w8-j5pw (GitHub-reviewed advisory GHSA-hmq9-67w8-j5pw lists affected ranges: Maven io.netty.incubator:netty-incubator-codec-bhttp >=0 <=0.0.22.Final)

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