CVE-2026-57458High· 8.1▾ MidnightPoC available

Vikunja is an open-source self-hosted task management platform

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 th…

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score57/ 100 · Moderate

impact 44.6 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

…

Published

Oct 9, 2026

Updated

Oct 16, 2026

CVSS

8.1

Vendor

api

Product

code.vikunja.io/api

CWE

CWE-269

Depth score

57 · Moderate

EPSS

0.33% · p26

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

decided 2026-10-13

Exploitation: poc
Automatable: no
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 11.

0.3% → 0.3%▲ 0.07%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

5 events · 17 days

Oct 9, 2026Published
Disclosed via NVD
Oct 11, 2026EPSS first tracked
0.3%
Oct 15, 2026Public exploit observed
Exploit / PoC code exists
Oct 16, 2026Record revised
Last analysed / modified upstream
Oct 26, 2026EPSS peak
0.3% → 0.3%

api CWE-269 #nvd #ghsa #go #osv #cve.org #exploit-available

Affected

code.vikunja.io/api = 2.3.0

Patched in

code.vikunja.io/api 2.4.0

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

Package advisory (CVE-2026-57458)

Affected packages:

code.vikunja.io/api = 2.3.0

Patched in:

code.vikunja.io/api 2.4.0

Source: https://github.com/advisories/GHSA-v3p6-34mc-hj7v

References

Change history

Field changes observed since this record was first indexed.

Oct 15, 2026Public exploit / PoC published

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#ghsa#go#osv#cve.org#exploit-available

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