Vulnerability DatabaseCVE-2026-123497
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CVE-2026-123497
Published:November 08, 2026
Updated:November 09, 2026
Vikunja veans before 2.7.1 contains a protocol downgrade vulnerability in serverCandidates that allows on-path attackers to force plain HTTP during veans init and login. Attackers can block HTTPS ports so discovery accepts an unverified HTTP response, capturing passwords, TOTP codes or bot tokens and persisting cleartext API traffic.
Affected Packages
https://github.com/go-vikunja/vikunja.git (GITHUB):
Affected version(s) >=v2.4.0 <v2.7.1
Fix Suggestion:
Update to version v2.7.1
Related Resources (4)
https://www.vulncheck.com/advisories/vikunja-veans-before-2.7.1-https-to-http-downgrade-in-server-discovery
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123497.json
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wqw2-rgwv-99qx
https://nvd.nist.gov/vuln/detail/CVE-2026-123497
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CVSS v4
Base Score:
7.6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Cleartext Transmission of Sensitive Information
CWE-319
EPSS
Base Score:
0.16