8.1

CVE-2026-57458: go-vikunja vikunja Improper Privilege Management

CVSS: 8.1v3.1HighDeferred
AliasesGHSA-v3p6-34mc-hj7vGO-2026-6750
Published 09-10-2026Last modified 13-10-2026
Open JSON

Vulnerability summary

CVE-2026-57458 is a high (CVSS 8.1) Improper Privilege Management vulnerability in go-vikunja vikunja. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.4% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-10-2026
    PublishedVulnerability first disclosed.
  2. 13-10-2026
    Last modifiedVulnerability information updated.

Description

Vikunja is an open-source self-hosted task management platform. In version 2.3.0, a scoped API token limited to the `oauth.authorize` permission can call `POST /api/v1/oauth/authorize`, obtain an OAuth authorization code, and exchange the code at `POST /api/v1/oauth/token` for a normal bearer JSON Web Token (JWT) and refresh token. The resulting credentials are not restricted by the original API token's permissions, allowing access to routes outside its declared scope for the same user. Version 2.4.0 fixes the vulnerability.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

10-10-202621-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Code.vikunja.io1 product
  • api≥ 2.3.0, < 2.4.0 | All versions (No fix recorded)
Go-vikunja1 product

2 vendors · 2 products

References

4 links