TI-2026-26055 Aliases CVE-2026-33675 GHSA-g66v-54v9-52pr

Vikunja has SSRF via Todoist/Trello Migration File Attachment URLs that Allows Reading Internal Network Resources

MEDIUM 62CWE-918Published 2026-03-24 · Updated 2026-03-24

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · None · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the migration helper functions `DownloadFile` and `DownloadFileWithHeaders` in `pkg/modules/migration/helpers.go` make arbitrary HTTP GET requests without any SSRF protection. When a user triggers a Todoist or Trello migration, file attachment URLs from the third-party API response are passed directly to these functions, allowing an attacker to force the Vikunja server to fetch internal network resources and return the response as a downloadable task attachment. Version 2.2.1 patches the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00277 20th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed vikunja (go-vikunja): 2.2.1code.vikunja.io/api (Go): 2.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
go-vikunja	vikunja	before 2.2.1	2.2.1	Patch available	CNA
—	code.vikunja.io/api (Go)	before 2.2.1	2.2.1	Patch available	GHSA-g66v-54v9-52pr

vikunja Vendorgo-vikunja Affected before 2.2.1 Fixed in 2.2.1 Patch available CNA
code.vikunja.io/api (Go) Vendor— Affected before 2.2.1 Fixed in 2.2.1 Patch available GHSA-g66v-54v9-52pr

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:vikunja:vikunja::::::::	before 2.2.1	Vulnerable	go-vikunja

cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* Versions before 2.2.1 Vulnerable ·go-vikunja

Remediation

Fix · CNA vikunja (go-vikunja) Fixed in 2.2.1
Fix · GHSA-g66v-54v9-52pr code.vikunja.io/api (Go) Fixed in 2.2.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-33675
2026-10-03 Alias added: GHSA-g66v-54v9-52pr

References

Other 2

TI-2026-21967 Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change CVSS 3.1CRITICAL 9.1
TI-2026-26971 Vikunja ahs a TOTP Two-Factor Authentication Bypass via OIDC Login Path CVSS 3.1CRITICAL 9.1
TI-2026-26060 Vikunja Vulnerable to Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation CVSS 3.1HIGH 7.5
TI-2026-20965 Vikunja Affected by XSS Via Task Preview CVSS 4.0HIGH 8.6
TI-2026-27698 Vikunja Affected by Privilege Escalation via Project Reparenting CVSS 3.1HIGH 8.3
TI-2026-25727 Vikunja’s Improper Access Control Enables Bypass of Administrator-Imposed Account Disablement CVSS 3.1HIGH 8.1

See all 34 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences