CVE-2026-12566

SSRF via unvalidated WWW-Authenticate realm in docker_pull module

Published Jun 17, 2026 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-3mp7-vp6j-2mxx BBOT: Server-Side Request Forgery (SSRF) in docker_pull module via WWW-Authenticate realm parsing
History
Type Values Removed Values Added
First Time appeared Black Lantern Security
Black Lantern Security bbot
Vendors & Products Black Lantern Security
Black Lantern Security bbot
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title SSRF via unvalidated WWW-Authenticate realm in docker_pull module
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
BLSOPS
Published
Updated
Jun 18, 2026, 12:50 PM
Reserved
Jun 17, 2026, 9:45 PM
Status
Deferred
Published
Jun 17, 2026, 11:17 PM
Modified
Oct 26, 2026, 11:10 AM