SSRF via unvalidated WWW-Authenticate realm in docker_pull module
Priority LOW 14CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 5th percentileScored 2026-11-07
Fix Fixed bbot (PyPI): 2.8.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Black Lantern Security | BBOT | 2.0.0 – <=2.8.4 | — | No fix listed | CNA |
| — | bbot (PyPI) | 2.0.0 to before 2.8.5 | 2.8.5 | Patch available | GHSA-3mp7-vp6j-2mxx |
- BBOT VendorBlack Lantern Security Affected 2.0.0 – <=2.8.4 Fixed in — No fix listed CNA
- bbot (PyPI) Vendor— Affected 2.0.0 to before 2.8.5 Fixed in 2.8.5 Patch available GHSA-3mp7-vp6j-2mxx
Remediation
- Fix · GHSA-3mp7-vp6j-2mxx bbot (PyPI) Fixed in 2.8.5 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-12566
- 2026-10-03 Alias added: GHSA-3mp7-vp6j-2mxx
References
More Black Lantern Security vulnerabilities
- TI-2026-10779 Arbitrary File Write in postman_download module CVSS 3.1MEDIUM 6.5
- TI-2026-10776 Path Traversal (Zip-Slip) in unarchive module CVSS 3.1MEDIUM 5.3
- TI-2026-12602 Path traversal in github_workflows allows writing artifacts outside output directory CVSS 3.1LOW 3.1
- TI-2026-12601 Symlink guard bypass in unarchive module allows planting symlinks during extraction CVSS 3.1LOW 3.1
- TI-2026-10778 Symlink-following arbitrary write via github_workflows module CVSS 3.1LOW 2.2
Sources
- CVE-2026-12566 · CVE Program
- CVE-2026-12566 · NVD
- FIRST EPSS
- GHSA-3mp7-vp6j-2mxx · GitHub Advisory Database · CC BY 4.0
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