FKIE_CVE-2026-27810
Vulnerability from fkie_nvd - Published: 2026-02-27 20:21 - Updated: 2026-06-17 10:276.4 (Medium) - CVSS:3.1/
| URL | Tags | ||
|---|---|---|---|
| security-advisories@github.com | https://github.com/kovidgoyal/calibre/security/advisories/GHSA-5fpj-fxw7-8grw | Exploit, Mitigation, Vendor Advisory |
| Vendor | Product | Version | |
|---|---|---|---|
| calibre-ebook | calibre | * |
{
"affected": [
{
"affectedData": [
{
"product": "calibre",
"vendor": "kovidgoyal",
"versions": [
{
"status": "affected",
"version": "\u003c 9.4.0"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*",
"matchCriteriaId": "3665E54E-5F8D-405A-BA97-8DD783962094",
"versionEndExcluding": "9.4.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, an HTTP Response Header Injection vulnerability in the calibre Content Server allows any authenticated user to inject arbitrary HTTP headers into server responses via an unsanitized `content_disposition` query parameter in the `/get/` and `/data-files/get/` endpoints. All users running the calibre Content Server with authentication enabled are affected. The vulnerability is exploitable by any authenticated user and can also be triggered by tricking an authenticated victim into clicking a crafted link. Version 9.4.0 contains a fix for the issue."
},
{
"lang": "es",
"value": "calibre es un gestor de libros electr\u00f3nicos multiplataforma para ver, convertir, editar y catalogar libros electr\u00f3nicos. Antes de la versi\u00f3n 9.4.0, una vulnerabilidad de inyecci\u00f3n de encabezado de respuesta HTTP en el servidor de contenido de calibre permite a cualquier usuario autenticado inyectar encabezados HTTP arbitrarios en las respuestas del servidor a trav\u00e9s de un par\u00e1metro de consulta \u0027content_disposition\u0027 no saneado en los puntos finales \u0027/get/\u0027 y \u0027/data-files/get/\u0027. Todos los usuarios que ejecutan el servidor de contenido de calibre con la autenticaci\u00f3n habilitada se ven afectados. La vulnerabilidad es explotable por cualquier usuario autenticado y tambi\u00e9n puede ser activada enga\u00f1ando a una v\u00edctima autenticada para que haga clic en un enlace manipulado. La versi\u00f3n 9.4.0 contiene una soluci\u00f3n para el problema."
}
],
"id": "CVE-2026-27810",
"lastModified": "2026-06-17T10:27:43.377",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.1,
"impactScore": 2.7,
"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.1,
"impactScore": 2.7,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-27810",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-02T12:53:21.102653Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-02-27T20:21:39.780",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Exploit",
"Mitigation",
"Vendor Advisory"
],
"url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-5fpj-fxw7-8grw"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-113"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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