CVE-2026-77386

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Source
https://cve.org/CVERecord?id=CVE-2026-77386
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77386.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-77386
Aliases
  • GHSA-xhg6-v78p-xf44
Published
2026-09-18T17:16:37Z
Modified
2026-09-26T03:30:59Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Kyoo: OIDC login token can be redirected to an attacker-controlled URL
Details

Kyoo is a self-hosted media server focused on movies, series, and anime. Prior to 5.1.0, an unauthenticated attacker could initiate the OIDC login flow with an attacker-controlled redirectUrl. The login handling in auth/oidc.go stored that URL with the opaque login state, and /auth/oidc/logged/{provider} appended the provider, token, and error values before redirecting the victim's browser without validating the destination. Because the one-use token was not bound to the browser session that initiated login, an attacker who induced a victim to complete OIDC authentication could capture the token at the attacker-controlled destination and exchange it through /auth/oidc/callback/{provider} for the victim's Kyoo session. This issue is fixed in version 5.1.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-601"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77386.json"
}
References

Affected packages

Git / github.com/zoriya/kyoo

Affected ranges

Type
GIT
Repo
https://github.com/zoriya/kyoo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
02ab3af8127a081295fd7bed103847173c0d7632
Fixed
c542adb5dc6d681e6491b28b5ac618c35c446d91
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "5.1.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.0.0
v2.*
v2.0.0
v3.*
v3.0.0
v4.*
v4.0.0
v4.1.0
v4.2.0
v4.3.0
v4.4.0
v4.5.0
v4.6.0
v4.7.0
v4.7.1
v5.*
v5.0.0
v5.0.0-beta1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77386.json"