Vulnerability · Published Jun 17, 2026 · Assigned by BLSOPS

CVE-2026-12566SSRF via unvalidated WWW-Authenticate realm in docker_pull module

Low 3.1

In plain English

A low-severity server-side request forgery in BBOT from Black Lantern Security. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.2%top 94.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	bbot	2.8.5	GHSA-3mp7-vp6j-2mxx
PyPI	bbot	2.8.5	PYSEC-2026-2391

Affected products (as reported)

Vendor	Product	Versions
Black Lantern Security	BBOT	2.0.0 – through <=2.8.4

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

References

https://github.com/blacklanternsecurity/bbot/commit/c2f4bc0f4