cve.bz

CVE-2026-55671

2.3 lowEPSS 0.4%

Low (2.3). EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/zitadel/zitadel 1.80.0-v2.20.0.20260615133614-8e82ec1cb9a2.

ZITADEL is an open source identity management platform. From 4.0.0-rc.1 through 4.15.1, ZITADEL's HTTP notification channels, OIDC BackChannel Logout, and SAML metadata URL fetches do not consistently validate user-defined URLs against protected denylist handling, allowing server-side requests to loopback, internal IP, link-local, or redirected endpoints through DNS rebinding, redirects, or protocol downgrades. This issue is fixed in version 4.15.2.

Severity

CVSS 4.0

2.3 low
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-31)
CWE
CWE-918
Published
Modified
Record from
the NVD, synced

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-29jh-8cfq-rr8xGogithub.com/zitadel/zitadel<1.80.0-v2.20.0.20260615133614-8e82ec1cb9a21.80.0-v2.20.0.20260615133614-8e82ec1cb9a2
GO-2026-5059Gogithub.com/zitadel/zitadel<1.80.0-v2.20.0.20260615133614-8e82ec1cb9a21.80.0-v2.20.0.20260615133614-8e82ec1cb9a2

References

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