What is CVE-2026-65055?

CVE-2026-65055 is a medium-severity vulnerability in Taiga Taiga-Back, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-07-21.

How severe is CVE-2026-65055?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Taiga Taiga-Back

CVE-2026-65055

Taiga 6.10.1 contains a missing authorization vulnerability that allows unauthenticated attackers to disclose the full member roster and internal workflow configuration of any private project by supplying a project ID to the filters_data API endpoints on UserStory, Task, Issue, and Epic viewsets. Attackers can send unauthenticated GET requests to the filters_data endpoints with sequential integer project IDs to enumerate private project membership details including user IDs, full names, and gravatar hashes, bypassing the access controls that correctly restrict other project API endpoints.

Vulnerability class: Broken Access Control

EPSS: 0.004 (36.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Taiga Taiga-back — versions 6.10.1

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-65055?: CVE-2026-65055 is a medium-severity vulnerability in Taiga Taiga-Back, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-07-21.
How severe is CVE-2026-65055?: Medium severity. CVSS v3 base score is 5.3 out of 10.