Vulnerability in github.com/zitadel/zitadel (CVE-2026-76081)
Summary
Vulnerability in github.com/zitadel/zitadel (CVE-2026-76081). Data can be tampered with by attackers. Mitigation: upgrade to 4.16.0 or later.
Original description
The description as published by the source.
Summary
A bug in how ZITADEL updates permissions when multiple project roles are deleted at the same time can cause some user permissions to be missed. This issue specifically affects User Grants on Granted Projects (projects shared between different organizations), potentially allowing users to keep access rights that were supposed to be completely removed.
Impact
When an organization shares a project with another organization (a Project Grant), administrators can assign specific roles to users via a User Grant. If multiple roles are deleted from that project at the same time, a background process runs to strip those roles from the assigned users.
Because of an error in how ZITADEL loops through a user's list of roles during this specific cross-organization cleanup, deleting two or more roles at once might cause the system to accidentally skip over some of them.
Scope Note: This vulnerability only affects User Grants on Granted Projects. Direct project roles and global organization roles are not impacted.
The risk depends entirely on what the skipped role allowed the user to do—if it was an administrative or high-privilege role, the user could potentially retain those elevated permissions within that granted project even after the role was officially deleted.
Affected Versions
- 4.x:
4.0.0through4.15.3(including RC versions) - 3.x:
3.0.0through3.4.12(including RC versions)
Note: The 3.x release channel has…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-76081 has been found in github.com/zitadel/zitadel.
Data can be tampered with by attackers. CVSS score: 5.5/10.
What to do: upgrade github.com/zitadel/zitadel to 4.16.0 or later.
If unsure, ask your IT team or search "github.com/zitadel/zitadel CVE-2026-76081" on the vendor's site.
CVE-2026-76081 (github.com/zitadel/zitadel) — CWE-193 / CVSS v3 5.5
Attack vector: remote (network-reachable) / no user interaction
Patched: 4.16.0 — apply immediately
Workaround: There are no configuration workarounds.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-193) exists in github.com/zitadel/zitadel.
Check the vendor advisory for the affected versions of github.com/zitadel/zitadel.
Severity: Medium (CVSS 5.5/10). Data can be tampered with by attackers.
Update to 4.16.0.
Workaround: There are no configuration workarounds.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/zitadel/zitadel' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/zitadel/zitadel' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/zitadel/zitadelを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
There are no configuration workarounds.パッチが適用されるまでの応急処置として、There are no configuration workarounds. を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Apply patch patch
Upgrade github.com/zitadel/zitadel to 4.16.0ステージング環境で 4.16.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
4Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- web github.com
- web github.com
- web github.com
- web github.com