Prowler: SAML Domain Claiming Enables Cross-Tenant Account Takeover

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Summary

CVECVE-2026-59151
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-10 19:17:26 UTC
Updated2026-07-10 19:20:15 UTC
DescriptionProwler is a cloud security platform. Prior to 5.30.3, Prowler's SAML authentication flow trusted the email domain asserted in a SAMLResponse when deciding which tenant should receive the final token, and the ACS finish logic in api/src/backend/api/v1/views.py recalculated the tenant from user.email instead of binding token issuance to the validated SAML configuration. An authenticated attacker with a controlled SAML IdP could complete a valid SAML flow for an attacker-controlled domain while asserting an email address from another configured domain, causing a SAMLToken and tenant-scoped JWT to be issued for the wrong tenant and enabling cross-tenant account takeover. This issue is fixed in version 5.30.3.

Risk And Classification

Primary CVSS: v3.1 9.6 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS: 0.002960000 probability, percentile 0.214150000 (date 2026-07-11)

Problem Types: CWE-287 | CWE-287 CWE-287: Improper Authentication

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.6CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
3.1CNADECLARED9.6CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Prowler-cloud Prowler affected < 5.30.3 Not specified

References

ReferenceSourceLinkTags
github.com/prowler-cloud/prowler/security/advisories/GHSA-h8m9-jgf8-vwvp [email protected] github.com
github.com/prowler-cloud/prowler/commit/bf3b5c2ba713e533014927141b64948c... [email protected] github.com
github.com/prowler-cloud/prowler/pull/11650 [email protected] github.com
github.com/prowler-cloud/prowler/releases/tag/5.30.3 [email protected] github.com
github.com/prowler-cloud/prowler/commit/f5ff30ad175bd2edf02cd28872653c1c... [email protected] github.com
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