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CVE-2026-27840

🗓️ 27 Feb 2026 04:13:41Reported by redhat.comType 
redhatcve
 redhatcve
🔗 access.redhat.com👁 1 Views

CVE-2026-27840: Zitadel truncates 80-char opaque v2 tokens omitting user_id; fixed by verifying user_id against session data.

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26 Feb 202600:00
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CVE-2026-27840 ZITADEL's truncated opaque tokens are still valid
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27 Feb 202621:22
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ZITADEL's truncated opaque tokens are still valid
27 Feb 202621:22
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26 Feb 202601:16
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CVE-2026-27840 ZITADEL's truncated opaque tokens are still valid
26 Feb 202600:27
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GHSA-6MQ3-XMGP-PJM5 ZITADEL's truncated opaque tokens are still valid
27 Feb 202621:22
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27 Feb 2026 04:13Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.14.3
EPSS0.00022
1