CVE-2026-91983

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Source
https://cve.org/CVERecord?id=CVE-2026-91983
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91983.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-91983
Aliases
  • GHSA-9rg3-v78m-26q8
Published
2026-09-15T15:18:26Z
Modified
2026-09-18T03:30:34Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Vikunja before 2.6.0 API Token Scope Bypass via expand Parameter
Details

Vikunja before 2.6.0 contains an API token scope bypass vulnerability in task read endpoints where authorization fails to inspect query string parameters. Attackers with limited token scopes can use the expand parameter to access restricted data like comments, reactions, and time entries without proper permission verification.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91983.json"
}
References

Affected packages

Git / github.com/go-vikunja/vikunja

Affected ranges

Type
GIT
Repo
https://github.com/go-vikunja/vikunja
Events
Introduced
3ba5192b1bd0607998bdaf9259d795fb14530384
Fixed
a4218eeb8fb3ada95e14a2331731524c9120d5bd
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "1.0.0"
        },
        {
            "fixed": "2.6.0"
        },
        {
            "introduced": "0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v1.*
v1.0.0
v1.1.0
v2.*
v2.0.0
v2.1.0
v2.2.0
v2.2.1
v2.2.2
v2.3.0
v2.4.0
v2.5.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91983.json"