Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/97049?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/97049?format=api", "vulnerability_id": "VCID-nj3z-4ya4-bqf7", "summary": "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.", "aliases": [ { "alias": "CVE-2026-27824" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/582437?format=api", "purl": "pkg:deb/debian/calibre@8.16.2%2Bds%2B~0.10.5-3~bpo13%2B1", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@8.16.2%252Bds%252B~0.10.5-3~bpo13%252B1" }, { "url": "http://public2.vulnerablecode.io/api/packages/921612?format=api", "purl": "pkg:deb/debian/calibre@9.4.0%2Bds%2B~0.10.5-1?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@9.4.0%252Bds%252B~0.10.5-1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/582195?format=api", "purl": "pkg:deb/debian/calibre@9.6.0%2Bds%2B~0.10.5-5?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@9.6.0%252Bds%252B~0.10.5-5%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/1041946?format=api", "purl": "pkg:deb/debian/calibre@9.6.0%2Bds%2B~0.10.5-6?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@9.6.0%252Bds%252B~0.10.5-6%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/1062443?format=api", "purl": "pkg:deb/debian/calibre@9.7.0%2Bds%2B~0.10.5-2?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@9.7.0%252Bds%252B~0.10.5-2%3Fdistro=trixie" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/582189?format=api", "purl": "pkg:deb/debian/calibre@5.12.0%2Bdfsg-1%2Bdeb11u2?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-2w1b-b6qm-4qhf" }, { "vulnerability": "VCID-b3vv-xdp2-7ub8" }, { "vulnerability": "VCID-bjj5-ynf7-v7aa" }, { "vulnerability": "VCID-dywq-dzuv-wka2" }, { "vulnerability": "VCID-hgmk-8s7s-tfdb" }, { "vulnerability": "VCID-jwpx-aqjh-dqej" }, { "vulnerability": "VCID-mqmp-g7uy-gbg4" }, { "vulnerability": "VCID-nj3z-4ya4-bqf7" }, { "vulnerability": "VCID-vq4p-dvg4-eudz" }, { "vulnerability": "VCID-x63d-4kux-cqcu" }, { "vulnerability": "VCID-zhz3-1799-a7hk" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@5.12.0%252Bdfsg-1%252Bdeb11u2%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/582434?format=api", "purl": "pkg:deb/debian/calibre@5.12.0%2Bdfsg-1%2Bdeb11u2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-2w1b-b6qm-4qhf" }, { "vulnerability": "VCID-4gvv-bsf9-vqca" }, { "vulnerability": "VCID-b3vv-xdp2-7ub8" }, { "vulnerability": "VCID-bjj5-ynf7-v7aa" }, { "vulnerability": "VCID-dywq-dzuv-wka2" }, { "vulnerability": "VCID-favj-1bjh-9uff" }, { "vulnerability": "VCID-hgmk-8s7s-tfdb" }, { "vulnerability": "VCID-jwpx-aqjh-dqej" }, { "vulnerability": "VCID-mqmp-g7uy-gbg4" }, { "vulnerability": "VCID-nj3z-4ya4-bqf7" }, { "vulnerability": "VCID-vq4p-dvg4-eudz" }, { "vulnerability": "VCID-x63d-4kux-cqcu" }, { "vulnerability": "VCID-zhz3-1799-a7hk" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@5.12.0%252Bdfsg-1%252Bdeb11u2" }, { "url": "http://public2.vulnerablecode.io/api/packages/582191?format=api", "purl": "pkg:deb/debian/calibre@6.13.0%2Brepack-2%2Bdeb12u5?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-2w1b-b6qm-4qhf" }, { "vulnerability": "VCID-bjj5-ynf7-v7aa" }, { "vulnerability": "VCID-dywq-dzuv-wka2" }, { "vulnerability": "VCID-hgmk-8s7s-tfdb" }, { "vulnerability": "VCID-jwpx-aqjh-dqej" }, { "vulnerability": "VCID-mqmp-g7uy-gbg4" }, { "vulnerability": "VCID-nj3z-4ya4-bqf7" }, { "vulnerability": "VCID-vq4p-dvg4-eudz" }, { "vulnerability": "VCID-x63d-4kux-cqcu" }, { "vulnerability": "VCID-zhz3-1799-a7hk" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@6.13.0%252Brepack-2%252Bdeb12u5%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/582435?format=api", "purl": "pkg:deb/debian/calibre@6.13.0%2Brepack-2%2Bdeb12u5", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-2w1b-b6qm-4qhf" }, { "vulnerability": "VCID-bjj5-ynf7-v7aa" }, { "vulnerability": "VCID-dywq-dzuv-wka2" }, { "vulnerability": "VCID-hgmk-8s7s-tfdb" }, { "vulnerability": "VCID-jwpx-aqjh-dqej" }, { "vulnerability": "VCID-mqmp-g7uy-gbg4" }, { "vulnerability": "VCID-nj3z-4ya4-bqf7" }, { "vulnerability": "VCID-vq4p-dvg4-eudz" }, { "vulnerability": "VCID-x63d-4kux-cqcu" }, { "vulnerability": "VCID-zhz3-1799-a7hk" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@6.13.0%252Brepack-2%252Bdeb12u5" }, { "url": "http://public2.vulnerablecode.io/api/packages/582193?format=api", "purl": "pkg:deb/debian/calibre@8.5.0%2Bds-1%2Bdeb13u1?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-2w1b-b6qm-4qhf" }, { "vulnerability": "VCID-bjj5-ynf7-v7aa" }, { "vulnerability": "VCID-dywq-dzuv-wka2" }, { "vulnerability": "VCID-hgmk-8s7s-tfdb" }, { "vulnerability": "VCID-jwpx-aqjh-dqej" }, { "vulnerability": "VCID-mqmp-g7uy-gbg4" }, { "vulnerability": "VCID-nj3z-4ya4-bqf7" }, { "vulnerability": "VCID-vq4p-dvg4-eudz" }, { "vulnerability": "VCID-x63d-4kux-cqcu" }, { "vulnerability": "VCID-zhz3-1799-a7hk" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@8.5.0%252Bds-1%252Bdeb13u1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/582436?format=api", "purl": "pkg:deb/debian/calibre@8.5.0%2Bds-1%2Bdeb13u1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-2w1b-b6qm-4qhf" }, { "vulnerability": "VCID-bjj5-ynf7-v7aa" }, { "vulnerability": "VCID-dywq-dzuv-wka2" }, { "vulnerability": "VCID-hgmk-8s7s-tfdb" }, { "vulnerability": "VCID-jwpx-aqjh-dqej" }, { "vulnerability": "VCID-mqmp-g7uy-gbg4" }, { "vulnerability": "VCID-nj3z-4ya4-bqf7" }, { "vulnerability": "VCID-vq4p-dvg4-eudz" }, { "vulnerability": "VCID-x63d-4kux-cqcu" }, { "vulnerability": "VCID-zhz3-1799-a7hk" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/calibre@8.5.0%252Bds-1%252Bdeb13u1" } ], "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27824", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.0002", "scoring_system": "epss", "scoring_elements": "0.05368", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.0002", "scoring_system": "epss", "scoring_elements": "0.05398", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.0002", "scoring_system": "epss", "scoring_elements": "0.05405", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.0002", "scoring_system": "epss", "scoring_elements": "0.0544", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.0002", "scoring_system": "epss", "scoring_elements": "0.05461", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00027", "scoring_system": "epss", "scoring_elements": "0.07707", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00027", "scoring_system": "epss", "scoring_elements": "0.07605", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.00027", "scoring_system": "epss", "scoring_elements": "0.07722", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00027", "scoring_system": "epss", "scoring_elements": "0.07617", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00027", "scoring_system": "epss", "scoring_elements": "0.07692", "published_at": "2026-04-13T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27824" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27824", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27824" }, { "reference_url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-vhxc-r7v8-2xrw", "reference_id": "GHSA-vhxc-r7v8-2xrw", "reference_type": "", "scores": [ { "value": "5.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-02T12:54:19Z/" } ], "url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-vhxc-r7v8-2xrw" } ], "weaknesses": [ { "cwe_id": 307, "name": "Improper Restriction of Excessive Authentication Attempts", "description": "The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks." }, { "cwe_id": 346, "name": "Origin Validation Error", "description": "The product does not properly verify that the source of data or communication is valid." } ], "exploits": [], "severity_range_score": "5.3 - 5.3", "exploitability": "0.5", "weighted_severity": "4.8", "risk_score": 2.4, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-nj3z-4ya4-bqf7" }