CVE-2026-12566
Last modified
CVE-2026-12566 is a low-severity vulnerability rated 3.1/10 on the CVSS scale. The docker_pull module uses the realm parameter from a Docker registry's WWW-Authenticate response header as the authentication endpoint without validation. An attacker in a man-in-the-middle position between bbot and a Docker registry could modify this header to redirect the authentication request to an arbitrary endpoint, potentially leaking authentication tokens.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.
Description
The docker_pull module uses the realm parameter from a Docker registry's WWW-Authenticate response header as the authentication endpoint without validation. An attacker in a man-in-the-middle position between bbot and a Docker registry could modify this header to redirect the authentication request to an arbitrary endpoint, potentially leaking authentication tokens.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
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