High severity · published Mar 24, 2026
CVE-2026-33679
Vikunja has SSRF via OpenID Connect Avatar Download that Bypasses Webhook SSRF Protections
7.4
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vikunja · go-vikunja
< 2.2.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33679
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33679
Patch
https://github.com/go-vikunja/vikunja/commit/363aa6642352b08fc8bc6aaff2f3a550393af1cf
Exploit
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-g9xj-752q-xh63
Release Notes
https://vikunja.io/changelog/vikunja-v2.2.2-was-released
More from vikunja
9.8
CVE-2026-28268
Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse
9.6
CVE-2026-33334
Vikunja Desktop: Any frontend XSS escalates to Remote Code Execution due to nodeIntegration
9.1
CVE-2026-34727
Vikunja ahs a TOTP Two-Factor Authentication Bypass via OIDC Login Path
9.1
CVE-2026-27575
Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change
8.8
CVE-2026-33336
Vikunja Desktop vulnerable to Remote Code Execution via same-window navigation