What is CVE-2026-33205?

CVE-2026-33205 is a medium-severity vulnerability in Calibre-ebook Calibre, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.5/10. Published 2026-03-27.

How severe is CVE-2026-33205?

Medium severity. CVSS v3 base score is 5.5 out of 10.

SSRF in Calibre-ebook Calibre

CVE-2026-33205

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a Server-Side Request Forgery vulnerability in the background-image endpoint of calibre e-book reader's web view a…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.002 (7.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Calibre-ebook Calibre
Kovidgoyal Calibre — versions < 9.6.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33205?: CVE-2026-33205 is a medium-severity vulnerability in Calibre-ebook Calibre, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.5/10. Published 2026-03-27.
How severe is CVE-2026-33205?: Medium severity. CVSS v3 base score is 5.5 out of 10.