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Wed, 04 Mar 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Calibre-ebook
Calibre-ebook calibre |
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| CPEs | cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Calibre-ebook
Calibre-ebook calibre |
Mon, 02 Mar 2026 13:15:00 +0000
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|---|---|---|
| Metrics |
ssvc
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Mon, 02 Mar 2026 12:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Kovidgoyal
Kovidgoyal calibre |
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| Vendors & Products |
Kovidgoyal
Kovidgoyal calibre |
Fri, 27 Feb 2026 20:00:00 +0000
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|---|---|---|
| Description | calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, the calibre Content Server's brute-force protection mechanism uses a ban key derived from both `remote_addr` and the `X-Forwarded-For` header. Since the `X-Forwarded-For` header is read directly from the HTTP request without any validation or trusted-proxy configuration, an attacker can bypass IP-based bans by simply changing or adding this header, rendering the brute-force protection completely ineffective. This is particularly dangerous for calibre servers exposed to the internet, where brute-force protection is the primary defense against credential stuffing and password guessing attacks. Version 9.4.0 contains a fix for the issue. | |
| Title | calibre has IP Ban Bypass via X-Forwarded-For Header Spoofing | |
| Weaknesses | CWE-307 CWE-346 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-02T12:54:32.182Z
Reserved: 2026-02-24T02:32:39.799Z
Link: CVE-2026-27824
Updated: 2026-03-02T12:54:28.301Z
Status : Analyzed
Published: 2026-02-27T20:21:39.973
Modified: 2026-03-04T16:39:05.407
Link: CVE-2026-27824
No data.
OpenCVE Enrichment
Updated: 2026-03-02T12:05:05Z