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CVE-2021-26291

9.1 · CRITICAL

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 ove…

Published Apr 23, 2021CWE-346EPSS 8.69%

Overview

CVE-2021-26291 is a critical-severity vulnerability. It was published on April 23, 2021 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2021/04/23/5Reflists.apache.org/thread.html/r0556ce5db7231025785477739ee416b169d8aff5ee9bac7854d64736%40%3Cannounce.apache.org%3EReflists.apache.org/thread.html/r06db4057b74e0598a412734f693a34a8836ac6f06d16d139e5e1027c%40%3Cdev.maven.apache.org%3EReflists.apache.org/thread.html/r07a89b32783f73bda6903c1f9aadeb859e5bef0a4daed6d87db8e4a9%40%3Cissues.karaf.apache.org%3EReflists.apache.org/thread.html/r08a401f8c98a99f68d061fde6e6659d695f28d60fe4f0413bcb355b0%40%3Ccommits.druid.apache.org%3EReflists.apache.org/thread.html/r0a5e4ff2a7ca7ad8595d7683afbaeb3b8788ba974681907f97e7dc8e%40%3Cjira.kafka.apache.org%3EReflists.apache.org/thread.html/r0d083314aa3934dd4b6e6970d1f6ee50f6eaa9d867deb2cd96788478%40%3Cjira.kafka.apache.org%3EReflists.apache.org/thread.html/r167dbc42ef7c59802c2ca1ac14735ef9cf687c25208229993d6206fe%40%3Cissues.karaf.apache.org%3EReflists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe%40%3Cusers.kafka.apache.org%3EReflists.apache.org/thread.html/r2ddabd06d94b60cfb0141e4abb23201c628ab925e30742f61a04d013%40%3Cissues.karaf.apache.org%3E

How CyberStrike helps

Frequently asked questions

What is CVE-2021-26291?

CVE-2021-26291 is a critical-severity vulnerability. It was published on April 23, 2021 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2021-26291?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-26291?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-26291?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-26291 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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