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CVE-2026-27840 ZITADEL's truncated opaque tokens are still valid

🗓️ 26 Feb 2026 00:27:08Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 20 Views

CVE-2026-27840: Zitadel truncates opaque tokens to 80 chars, omitting user_id; fixed in versions 3.4.7 and 4.11.0.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-27840
26 Feb 202600:27
attackerkb
Circl
CVE-2026-27840
26 Feb 202602:05
circl
CNNVD
ZITADEL 安全漏洞
26 Feb 202600:00
cnnvd
CVE
CVE-2026-27840
26 Feb 202600:27
cve
EUVD
EUVD-2026-8789
27 Feb 202621:22
euvd
Github Security Blog
ZITADEL's truncated opaque tokens are still valid
27 Feb 202621:22
github
NVD
CVE-2026-27840
26 Feb 202601:16
nvd
OSV
CVE-2026-27840 ZITADEL's truncated opaque tokens are still valid
26 Feb 202600:27
osv
OSV
GHSA-6MQ3-XMGP-PJM5 ZITADEL's truncated opaque tokens are still valid
27 Feb 202621:22
osv
OSV
GO-2026-4573 ZITADEL's truncated opaque tokens are still valid in github.com/zitadel/zitadel
10 Mar 202618:28
osv
Rows per page
[
  {
    "vendor": "zitadel",
    "product": "zitadel",
    "versions": [
      {
        "version": ">= 4.0.0, < 4.11.0",
        "status": "affected"
      },
      {
        "version": ">= 3.0.0, < 3.4.7",
        "status": "affected"
      },
      {
        "version": ">= 2.31.0, <= 2.71.19",
        "status": "affected"
      }
    ]
  }
]

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