Is there a public exploit for CVE-2026-57448?

No public exploit for CVE-2026-57448 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-57448?

CVE-2026-57448 scores CVSS 6.2 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.34%.

What does CVE-2026-57448 affect?

CVE-2026-57448 affects mrblomblo blombooru.

6.2 Medium

Blombooru is a self-hosted personal booru for organizing and tagging private image collections.

CVE-2026-57448

Blombooru is a self-hosted personal booru for organizing and tagging private image collections. Prior to 1.40.0, the administrator-only GET /proxy-image endpoint, exposed as /api/booru-import/proxy-image, accepts a url query parameter and fetches it server-side without meaningful destination validation. proxyimage() in backend/app/routes/booruimport.py only checks whether the value starts with http, then uses getclientforurl or requests.get and streams the response. Private, loopback and link-local addresses are not blocked, and automatically followed redirects can move a request from a trusted domain to an internal address. An authenticated administrator can enumerate internal services and access cloud instance metadata, potentially disclosing IAM credentials and crossing the application's intended cloud or network trust boundary. The reporter also observed a hanging recursive self-request. Administrator authentication remains a prerequisite; this is not an anonymous proxy. This issue is fixed in version 1.40.0.

Assessment

CVSS: 6.2 (v4.0)
Severity: Medium
EPSS: 0.34% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 October 2026
Last updated: 3 November 2026
Affected: mrblomblo · blombooru
Assigner: GitHub_M

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N

At the source

EUVD (ENISA)

References

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