CVE-2026-30975 (GCVE-0-2026-30975)
Vulnerability from cvelistv5 – Published: 2026-03-25 21:08 – Updated: 2026-03-26 15:23
VLAI
EPSS
VEX
Title
Sonarr Authentication Bypass vulnerability
Summary
Sonarr is a PVR for Usenet and BitTorrent users. Versions prior to 4.0.16.2942 have an authentication bypass that affected users that had disabled authentication for local addresses (Authentication Required set to: `Disabled for Local Addresses`) without a reverse proxy running in front of Sonarr that didn't not pass through the invalid header. Patches are available in version 4.0.16.2942 in the nightly/develop branch and version 4.0.16.2944 for stable/main releases. Some workarounds are available. Make sure Sonarr's Authentication Required setting is set to `Enabled`, run Sonarr behind a reverse proxy, and/or do not expose Sonarr directly to the internet and instead rely on accessing it through a VPN, Tailscale or a similar solution.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-26 15:23 UTC
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/Sonarr/Sonarr/security/advisor… | x_refsource_CONFIRM |
| https://github.com/Sonarr/Sonarr/releases/tag/v4.… | x_refsource_MISC |
| https://github.com/Sonarr/Sonarr/releases/tag/v4.… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-30975",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-26T15:23:30.487188Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-26T15:23:38.612Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Sonarr",
"vendor": "Sonarr",
"versions": [
{
"status": "affected",
"version": "\u003c 4.0.16.2942"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Sonarr is a PVR for Usenet and BitTorrent users. Versions prior to 4.0.16.2942 have an authentication bypass that affected users that had disabled authentication for local addresses (Authentication Required set to: `Disabled for Local Addresses`) without a reverse proxy running in front of Sonarr that didn\u0027t not pass through the invalid header. Patches are available in version 4.0.16.2942 in the nightly/develop branch and version 4.0.16.2944 for stable/main releases. Some workarounds are available. Make sure Sonarr\u0027s Authentication Required setting is set to `Enabled`, run Sonarr behind a reverse proxy, and/or do not expose Sonarr directly to the internet and instead rely on accessing it through a VPN, Tailscale or a similar solution."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-290",
"description": "CWE-290: Authentication Bypass by Spoofing",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-25T21:08:15.426Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r"
},
{
"name": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942"
},
{
"name": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944"
}
],
"source": {
"advisory": "GHSA-h5qx-5hjf-7c9r",
"discovery": "UNKNOWN"
},
"title": "Sonarr Authentication Bypass vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-30975",
"datePublished": "2026-03-25T21:08:15.426Z",
"dateReserved": "2026-03-07T17:53:48.816Z",
"dateUpdated": "2026-03-26T15:23:38.612Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-30975",
"date": "2026-10-07",
"epss": "0.00603",
"percentile": "0.47193"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Sonarr",
"vendor": "Sonarr",
"versions": [
{
"status": "affected",
"version": "\u003c 4.0.16.2942"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:sonarr:sonarr:*:*:*:*:*:*:*:*",
"matchCriteriaId": "03480656-DD06-48B9-AB6B-40F751EDAA17",
"versionEndExcluding": "4.0.16.2942",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Sonarr is a PVR for Usenet and BitTorrent users. Versions prior to 4.0.16.2942 have an authentication bypass that affected users that had disabled authentication for local addresses (Authentication Required set to: `Disabled for Local Addresses`) without a reverse proxy running in front of Sonarr that didn\u0027t not pass through the invalid header. Patches are available in version 4.0.16.2942 in the nightly/develop branch and version 4.0.16.2944 for stable/main releases. Some workarounds are available. Make sure Sonarr\u0027s Authentication Required setting is set to `Enabled`, run Sonarr behind a reverse proxy, and/or do not expose Sonarr directly to the internet and instead rely on accessing it through a VPN, Tailscale or a similar solution."
},
{
"lang": "es",
"value": "Sonarr es un PVR para usuarios de Usenet y BitTorrent. Las versiones anteriores a la 4.0.16.2942 tienen una omisi\u00f3n de autenticaci\u00f3n que afectaba a los usuarios que hab\u00edan deshabilitado la autenticaci\u00f3n para direcciones locales (Autenticaci\u00f3n Requerida configurada como: \u0027Deshabilitada para Direcciones Locales\u0027) sin un proxy inverso ejecut\u00e1ndose delante de Sonarr que s\u00ed pasara la cabecera inv\u00e1lida. Los parches est\u00e1n disponibles en la versi\u00f3n 4.0.16.2942 en la rama nightly/develop y en la versi\u00f3n 4.0.16.2944 para las versiones stable/main. Algunas soluciones alternativas est\u00e1n disponibles. Aseg\u00farese de que la configuraci\u00f3n \u0027Autenticaci\u00f3n Requerida\u0027 de Sonarr est\u00e9 establecida en \u0027Habilitada\u0027, ejecute Sonarr detr\u00e1s de un proxy inverso, y/o no exponga Sonarr directamente a internet y, en su lugar, conf\u00ede en acceder a \u00e9l a trav\u00e9s de una VPN, Tailscale o una soluci\u00f3n similar."
}
],
"id": "CVE-2026-30975",
"lastModified": "2026-06-17T10:33:15.330",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.2,
"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-30975",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-26T15:23:30.487188Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-03-25T21:16:41.453",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944"
},
{
"source": "security-advisories@github.com",
"tags": [
"Vendor Advisory"
],
"url": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-290"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-30975",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-26T15:23:30.487188Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-26T15:23:34.236Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Sonarr",
"vendor": "Sonarr",
"versions": [
{
"status": "affected",
"version": "\u003c 4.0.16.2942"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Sonarr is a PVR for Usenet and BitTorrent users. Versions prior to 4.0.16.2942 have an authentication bypass that affected users that had disabled authentication for local addresses (Authentication Required set to: `Disabled for Local Addresses`) without a reverse proxy running in front of Sonarr that didn\u0027t not pass through the invalid header. Patches are available in version 4.0.16.2942 in the nightly/develop branch and version 4.0.16.2944 for stable/main releases. Some workarounds are available. Make sure Sonarr\u0027s Authentication Required setting is set to `Enabled`, run Sonarr behind a reverse proxy, and/or do not expose Sonarr directly to the internet and instead rely on accessing it through a VPN, Tailscale or a similar solution."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-290",
"description": "CWE-290: Authentication Bypass by Spoofing",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-25T21:08:15.426Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/Sonarr/Sonarr/security/advisories/GHSA-h5qx-5hjf-7c9r"
},
{
"name": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2942"
},
{
"name": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Sonarr/Sonarr/releases/tag/v4.0.16.2944"
}
],
"source": {
"advisory": "GHSA-h5qx-5hjf-7c9r",
"discovery": "UNKNOWN"
},
"title": "Sonarr Authentication Bypass vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-30975",
"datePublished": "2026-03-25T21:08:15.426Z",
"dateReserved": "2026-03-07T17:53:48.816Z",
"dateUpdated": "2026-03-26T15:23:38.612Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- 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.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…