CVE-2026-34031— Apache Answer: The custom avatar was not properly validated
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache Answer | ≤ 2.0.0 | affected |
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I. Basic Information for CVE-2026-34031
Vulnerability Information
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Vulnerability Title
Apache Answer: The custom avatar was not properly validated
Source: NVD (National Vulnerability Database)
Vulnerability Description
Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. The server did not sufficiently validate user-supplied image URLs, allowing arbitrary external content to be embedded as profile images, which could expose users to unintended external requests and tracking by third-party servers. Users are recommended to upgrade to version 2.0.1, which fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
危险类型文件的不加限制上传
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache Answer 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Answer是美国阿帕奇（Apache）基金会的一个社区平台。 Apache Answer 2.0.0及之前版本存在代码问题漏洞，该漏洞源于对危险类型文件上传限制不足，服务器未充分验证用户提供的图像URL，允许任意外部内容嵌入为个人资料图像，可能导致用户暴露于意外外部请求和第三方服务器跟踪。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Answer | 0 ~ 2.0.0 | - |
II. Public POCs for CVE-2026-34031
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-34031 (1)
Same Patch Batch · Apache Software Foundation · 2026-06-09 · 7 CVEs total
| CVE-2026-49818 | Apache Airflow Samba provider: Path traversal in GCSToSambaOperator via GCS object names | |
| CVE-2026-34905 | Apache Answer: Unlisted Questions Accessible via Direct API Access | |
| CVE-2026-34033 | Apache Answer: HTML Content Injection in Email | |
| CVE-2026-33582 | Apache Answer: Uploading specially crafted TIFF files causes an Out-of-Memory error | |
| CVE-2026-25699 | Apache Answer: Authorization Bypass in Timeline API | |
| CVE-2026-25688 | Apache Answer: XSS in AI Answer Rendering |
IV. Related Vulnerabilities
Same product: Apache Answer
- CVE-2026-25700
Apache Answer: AdminToken not invalidated after admin deacti - CVE-2026-34905
Apache Answer: Unlisted Questions Accessible via Direct API - CVE-2026-34033
Apache Answer: HTML Content Injection in Email - CVE-2026-33582
Apache Answer: Uploading specially crafted TIFF files causes - CVE-2026-25699
Apache Answer: Authorization Bypass in Timeline API
Same vendor: Apache Software Foundation
- CVE-2026-49268
Apache Shiro: LDAP DN Injection in DefaultLdapRealm - CVE-2026-47340
Apache DolphinScheduler: An incorrect authorization vulnerab - CVE-2026-32967
Apache DolphinScheduler: The `/v2` experimental interface la - CVE-2026-42357
Apache DolphinScheduler: Incorrect Authorization vulnerabili - CVE-2026-41280
Apache DolphinScheduler: Incorrect Authorization vulnerabili
Same weakness: CWE-434
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V. Comments for CVE-2026-34031
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