Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Vikunja versions 2.2.0 through 2.6.0 allow credentialed cross-origin requests from any localhost or 127.0.0.1 port, because the default CORS origins are kept even when service.publicurl is set. A page open on the user's own machine can call the token refresh endpoint and read the returned bearer token, giving access to the logged-in account. No fixed version is listed. Limit cors.origins to your own site, or avoid running untrusted local pages while logged in.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.2 | High | 4.0 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0015, the 4th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:11 UTC First seen by agentprime
- 31 Oct 2026, 14:11 UTC Confirmed by OSV