CVE-2026-12566
SSRF via unvalidated WWW-Authenticate realm in docker_pull module
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.
INFO
Published Date :
June 17, 2026, 11:17 p.m.
Last Modified :
June 22, 2026, 5:45 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | LOW | 27b6da8a-f51d-48d9-9eef-9b7f3405d20d | ||||
| CVSS 3.1 | LOW | [email protected] |
Solution
- Validate the realm parameter from the WWW-Authenticate header.
- Avoid using it directly as an authentication endpoint.
- Implement strict validation rules for registry endpoints.
- Consider using a secure communication channel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-12566.
| URL | Resource |
|---|---|
| https://github.com/blacklanternsecurity/bbot/commit/c2f4bc0f4 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-12566 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-12566
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-12566 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-12566 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 18, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-12566', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-18T12:50:29.407349Z'} -
New CVE Received by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/blacklanternsecurity/bbot', 'vendor': 'Black Lantern Security', 'product': 'BBOT', 'versions': [{'status': 'affected', 'version': '2.0.0', 'versionType': 'custom', 'lessThanOrEqual': '<=2.8.4'}], 'defaultStatus': 'unaffected'}] 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Added CWE CWE-918 Added Reference https://github.com/blacklanternsecurity/bbot/commit/c2f4bc0f4