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vuln-cve/data/2026/44xxx/CVE-2026-44649.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-44649",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-05-07T15:30:10.875Z",
"datePublished": "2026-05-29T17:45:26.073Z",
"dateUpdated": "2026-06-02T01:48:37.402Z"
},
"containers": {
"cna": {
"title": "SillyTavern: Authentication Bypass via SSO Header Injection",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-290",
"lang": "en",
"description": "CWE-290: Authentication Bypass by Spoofing",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-306",
"lang": "en",
"description": "CWE-306: Missing Authentication for Critical Function",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-346",
"lang": "en",
"description": "CWE-346: Origin Validation Error",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-807",
"lang": "en",
"description": "CWE-807: Reliance on Untrusted Inputs in a Security Decision",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"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"
}
}
],
"references": [
{
"name": "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-gxx6-h3g6-vwjh",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-gxx6-h3g6-vwjh"
}
],
"affected": [
{
"vendor": "SillyTavern",
"product": "SillyTavern",
"versions": [
{
"version": "< 1.18.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-05-29T17:45:26.073Z"
},
"descriptions": [
{
"lang": "en",
"value": "SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to 1.18.0, SillyTavern accepts Remote-User (Authelia) and X-Authentik-Username (Authentik) HTTP headers to automatically log in users when SSO is configured. There is no validation that these headers originate from a trusted reverse proxy. Any network client that can reach the SillyTavern port directly can inject these headers and authenticate as any user, including administrators, without a password. This vulnerability is exploitable only when sso.autheliaAuth: true or sso.authentikAuth: true is set in config.yaml (both default to false). This vulnerability is fixed in 1.18.0."
}
],
"source": {
"advisory": "GHSA-gxx6-h3g6-vwjh",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-gxx6-h3g6-vwjh",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-06-02T01:48:09.329370Z",
"id": "CVE-2026-44649",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-06-02T01:48:37.402Z"
}
}
]
}
}