CVE-2026-33679 json
Vikunja has SSRF via OpenID Connect Avatar Download that Bypasses Webhook SSRF Protections
published 2026-03-24 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-14923 , GHSA-g9xj-752q-xh63 , GO-2026-4852
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go code.vikunja.io/api 2.2.1
- vikunja vikunja 2.2.1
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260326T203309-150000.1.155.2
suse advisories SUSE-SU-2026:1135-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-g9xj-752q-xh63 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L |
| GitHub | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L |
| NVD | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | <2.2.1 all versions |
2.2.1 |
Affected products
- go-vikunja vikunja
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/go-vikunja/vikunja/commit/363aa6642352b08fc8bc6aaff2f3a550393af1cf
web, patch
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-g9xj-752q-xh63
web, exploit, vendor-advisory, advisory
-
vikunja.io
/changelog/vikunja-v2.2.2-was-released
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-33679
advisory
-
github.com
/go-vikunja/vikunja
package
-
pkg.go.dev
/vuln/GO-2026-4852
web
Sources
- CVE List CVE-2026-33679
- GitHub Advisory GHSA-g9xj-752q-xh63
- NVD CVE-2026-33679
- OSV GO-2026-4852
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.