HOMEVULNERABILITIESCVE-2026-33679
HIGH

CVE-2026-33679

CWE-918Published: March 24, 2026· Updated: Mar 30, 2026

7.4
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:9.7th

Official Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DownloadImage` function in `pkg/utils/avatar.go` uses a bare `http.Client{}` with no SSRF protection when downloading user avatar images from the OpenID Connect `picture` claim URL. An attacker who controls their OIDC profile picture URL can force the Vikunja server to make HTTP GET requests to arbitrary internal or cloud metadata endpoints. This bypasses the SSRF protections that are correctly applied to the webhook system. Version 2.2.1 patches the issue.

NVD Source

Technical Analysis

CVE-2026-33679 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeChanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

Affected Vendors & Products

vikunja1 product
vikunja
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

All References (3)

Quick Facts

CVE IDCVE-2026-33679
CVSS Score7.4 / 10
SeverityHIGH
WeaknessCWE-918
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedMar 24, 2026

Related CVEs (CWE-918)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2026-33679 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.