CVE-2021-26291
maven: Block repositories using http by default
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 23, 2021
Updated · November 5, 2026
Description
A flaw was found in maven. Repositories that are defined in a dependency’s Project Object Model (pom), which may be unknown to users, are used by default 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. The highest threat from this vulnerability is to data confidentiality and integrity.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
To avoid possible man-in-the-middle related attacks with this flaw, ensure any linked repositories in maven POMs use https and not http.
CVSS / CWE
CVSS 3.1 · 7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor