---
id: CVE-2026-111804
title: >-
  Apache Traffic Server: wasm plugin has a use-after-free and forwards
  unvalidated guest metric IDs
summary: >-
  Apache Traffic Server's experimental wasm plugin has a use-after-free in its
  transaction-close handler and forwards unvalidated guest-supplied metric IDs
  to the internal stats API.




  This issue affects Apache Traffic Server: from 10.0.0…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-416
vendor: Apache Software Foundation
product: Apache Traffic Server
affected:
  - apache_traffic_server >= 10.0.0 <= 10.1.4
  - apache_traffic_server 10.2.0
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T18:21:32.055Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111804'
references:
  - url: 'https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc'
tags:
  - cve.org
ingestedAt: '2026-10-21T19:10:31.402Z'
---

## Overview

Apache Traffic Server's experimental wasm plugin has a use-after-free in its transaction-close handler and forwards unvalidated guest-supplied metric IDs to the internal stats API.



This issue affects Apache Traffic Server: from 10.0.0 through 10.1.4, 10.2.0.



Users are recommended to upgrade to version 10.1.5 or 10.2.1, which fix the issue.

## Affected

- `apache_traffic_server >= 10.0.0 <= 10.1.4`
- `apache_traffic_server 10.2.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.