SSRF via unvalidated WWW-Authenticate realm in docker_pull module

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Summary

CVECVE-2026-12566
StatePUBLISHED
AssignerBLSOPS
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-17 23:17:03 UTC
Updated2026-06-22 17:45:43 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 3.1 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS: 0.001670000 probability, percentile 0.062130000 (date 2026-06-21)

Problem Types: CWE-918 | CWE-918 CWE-918 Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.1LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
3.1CNACVSS3.1LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Black Lantern Security BBOT affected 2.0.0 <=2.8.4 custom Not specified

References

ReferenceSourceLinkTags
github.com/blacklanternsecurity/bbot/commit/c2f4bc0f4 [email protected] github.com
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