November 14, 2026

CVE Watchtower

CVE-2026-123527go-vikunja vikunja Incorrect Authorization

NVD

Vulnerability Summary

Vikunja from 2.4.0 before 2.7.1 contains an authorization bypass vulnerability that allows token holders to perform unintended operations due to colliding v1 and v2 API token permission keys. Attackers with a token scoped to read project backgrounds can delete them via the v2 DELETE background route, and bucket create-only tokens can update existing buckets.
Severity Level
MEDIUM(5.3)
Published Date
Nov 8, 2026
Last Modified
Nov 12, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.24%Probability
Root Weakness (CWE)
CWE-863: Incorrect Authorization ↗
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CVSS v4.0 Base Metrics — Score 5.3 (MEDIUM)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredLow
User InteractionNone
Confidentiality (Vulnerable System)None
Integrity (Vulnerable System)Low
Availability (Vulnerable System)Low
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
Show CVSS v3.x metrics (score 5.4)
CVSS v3.1 Base Metrics — Score 5.4 (MEDIUM)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityLow

Affected & Patched Versions

Affected Versions
  • go-vikunja vikunja >= 2.4.0 and < 2.7.1
Patched Versions
  • go-vikunja vikunja 2.7.1

What to do

Fix it during your normal patch cycle. No exploitation is confirmed yet.

  1. Check whether you run go-vikunja vikunja and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Nov 8, 2026Published
  • Nov 12, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 14, 2026 03:11 UTC