CVE Explorer

CVE-2026-55671

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:50752d071f481f02ddc7c20395faf6708b96e6fc2cd67fdbd49e682893489e83

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"zitadel","vendor":"zitadel","versions":[{"status":"affected","version":"< 4.15.2"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:de5dad97275b84bee8cb90fd5553625733dd9415b491927751144bbb33b8b664 · sha256:073e9f0b9cacd794… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:de5dad97275b84bee8cb90fd5553625733dd9415b491927751144bbb33b8b664 · sha256:073e9f0b9cacd794… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:de5dad97275b84bee8cb90fd5553625733dd9415b491927751144bbb33b8b664 · sha256:073e9f0b9cacd794… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"name":"https://github.com/zitadel/zitadel/commit/b6f78086913b8d916bce9ab2e049ab0d84f947fd","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/commit/b6f78086913b8d916bce9ab2e049ab0d84f947fd"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:de5dad97275b84bee8cb90fd5553625733dd9415b491927751144bbb33b8b664 · sha256:073e9f0b9cacd794… · /containers/cna/references/1

{"name":"https://github.com/zitadel/zitadel/releases/tag/v4.15.2","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/releases/tag/v4.15.2"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:de5dad97275b84bee8cb90fd5553625733dd9415b491927751144bbb33b8b664 · sha256:073e9f0b9cacd794… · /containers/cna/references/2

{"name":"https://github.com/zitadel/zitadel/security/advisories/GHSA-29jh-8cfq-rr8x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/zitadel/zitadel/security/advisories/GHSA-29jh-8cfq-rr8x"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:de5dad97275b84bee8cb90fd5553625733dd9415b491927751144bbb33b8b664 · sha256:073e9f0b9cacd794… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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