What is CVE-2026-0612?

CVE-2026-0612 is a high-severity vulnerability in Thelibrarian The Librarian, classified under CWE-497: EXPOSURE OF SENSITIVE SYSTEM INFORMATION TO AN UNAUTHORIZED CONTROL SPHERE. CVSS score: 7.5/10. Published 2026-01-16.

How severe is CVE-2026-0612?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Thelibrarian The Librarian

CVE-2026-0612

The Librarian contains a information leakage vulnerability through the `web_fetch` tool, which can be used to retrieve arbitrary external content provided by an attacker, which can be used to proxy requests through The Librarian infrastructure. The vendor has fixed the vulnerability in all versions of TheLibrarian.

EPSS: 0.003 (26.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Thelibrarian The_librarian
Thelibrarian Thelibrarian.io — versions 0

References

cret@cert.org (Third Party Advisory)
cret@cert.org (Product)

Frequently asked questions

What is CVE-2026-0612?: CVE-2026-0612 is a high-severity vulnerability in Thelibrarian The Librarian, classified under CWE-497: EXPOSURE OF SENSITIVE SYSTEM INFORMATION TO AN UNAUTHORIZED CONTROL SPHERE. CVSS score: 7.5/10. Published 2026-01-16.
How severe is CVE-2026-0612?: High severity. CVSS v3 base score is 7.5 out of 10.