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CVE-2021-26291— block repositories using http by default

Quick assessment

Affected
Apache Software Foundation Apache Maven
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Maven是美国阿帕奇（Apache）基金会的一个应用软件。一个软件项目管理和理解工具。 Apache Maven 存在安全漏洞，该漏洞源于一个恶意的参与者接管了该存储库或能够将自己插入到一个位置来假装是该存储库，就会导致潜在的风险。

AI Predicted 5.3 Difficulty: Easy EPSS 8.69% · P95

Possible ATT&CK Techniques 1 AI

T1195 · Supply Chain Compromise
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I. Basic Information for CVE-2021-26291

Vulnerability Information
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Vulnerability Title
block repositories using http by default
Source: CVE Program / CVE List V5
Vulnerability Description
Apache Maven will follow repositories that are defined in a dependency’s Project Object Model (pom) which may be surprising to some users, resulting in potential risk if a malicious actor takes over that repository or is able to insert themselves into a position to pretend to be that repository. Maven is changing the default behavior in 3.8.1+ to no longer follow http (non-SSL) repository references by default. More details available in the referenced urls. If you are currently using a repository manager to govern the repositories used by your builds, you are unaffected by the risks present in the legacy behavior, and are unaffected by this vulnerability and change to default behavior. See this link for more information about repository management: https://maven.apache.org/repository-management.html
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Maven 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Maven是美国阿帕奇（Apache）基金会的一个应用软件。一个软件项目管理和理解工具。 Apache Maven 存在安全漏洞，该漏洞源于一个恶意的参与者接管了该存储库或能够将自己插入到一个位置来假装是该存储库，就会导致潜在的风险。
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 Maven Apache Maven ~ 3.8.1 -

II. Public POCs for CVE-2021-26291

# POC Description Source Link Shenlong Link
1 Context of CVE-2021-26291 minimal replicator https://github.com/jpmartins/MinimalReproducer POC Details
AI-Generated POC Premium
default-local-qwen3.6 · 14138 chars
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III. Intelligence Information for CVE-2021-26291

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Vendor Advisories for CVE-2021-26291 (2)

Mailing List Discussions for CVE-2021-26291 (39)

Security Blog Posts for CVE-2021-26291 (1)

IV. Related Vulnerabilities

Same product: Apache Maven
Same vendor: Apache Software Foundation

V. Comments for CVE-2021-26291

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