---
id: CVE-2026-82384
title: >-
  Deserialization of Untrusted Data in Apache Roller 6.1.5 allows an
  unauthenticated remote attacker to cause deserialization of
  attacker-controlled bytes, because the XML-RPC endpoint accepts vendor
  extension types that are deserialized d…
summary: >-
  Deserialization of Untrusted Data in Apache Roller 6.1.5 allows an
  unauthenticated remote attacker to cause deserialization of
  attacker-controlled bytes, because the XML-RPC endpoint accepts vendor
  extension types that are deserialized d…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
vendor: Apache Software Foundation
product: Apache Roller
affected:
  - apache_roller 6.1.5
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T09:17:06.650'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82384'
references:
  - url: 'https://github.com/apache/roller/pull/171'
    label: security@apache.org
  - url: 'https://lists.apache.org/thread/21p1dh6x179gmcdpw84kkx9yclrdp410'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/25/17'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-28T09:06:28.556Z'
---

## Overview

Deserialization of Untrusted Data in Apache Roller 6.1.5 allows an unauthenticated remote attacker to cause deserialization of attacker-controlled bytes, because the XML-RPC endpoint accepts vendor extension types that are deserialized during request parsing, before authentication. The servlet is mapped unconditionally, so parsing occurs even when the global XML-RPC feature is set to disabled; no non-default configuration is required for this path. This can lead to remote code execution. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which disables the extension types and rejects requests when the XML-RPC feature is disabled.

## Remediation

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