CVE-2026-27840
ZITADEL's truncated opaque tokens are still valid in github.com/zitadel/zitadel
4.3
MEDIUM
CVSS 3.1
EPSS 0.02%
Description
ZITADEL's truncated opaque tokens are still valid in github.com/zitadel/zitadel. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/zitadel/zitadel from v3.0.0 before v3.4.7; github.com/zitadel/zitadel from v4.0.0 before v4.11.0.
How to fix CVE-2026-27840
To remediate CVE-2026-27840, upgrade the affected package to a fixed version below.
- —upgrade to 4.11.0 or later
- —no fix listed
Is CVE-2026-27840 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 4.0.0, < 4.11.0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |