7.7

CVE-2026-76216: go-vikunja vikunja

CVSS: 7.7v4.0HighDeferred
AliasesGHSA-32r8-5843-4qw2GO-2026-6711
Published 19-08-2026Last modified 20-08-2026
Open JSON

Vulnerability summary

CVE-2026-76216 is a high (CVSS 7.7) vulnerability in go-vikunja vikunja. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.8% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.36%
0%100%
Low · +0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 19-08-2026
    PublishedVulnerability first disclosed.
  2. 20-08-2026
    Last modifiedVulnerability information updated.

Description

Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are treated as user principals with users.id == N at three permission checks lacking type guards. Attackers with a link-share JWT can remove victims from teams, enumerate and delete victim bot users, or read team rosters by exploiting id collisions in the autoincrement space.

CVSS metrics

5 scores · 3 sources · 2 versions

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

+0.10 pp

From 0.26% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.36%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Code.vikunja.io1 product
  • api≤ 2.4.0 | All versions (No fix recorded)
Go-vikunja1 product

2 vendors · 2 products

References

4 links