---
title: "CVE-2026-59151: Prowler: SAML Domain Claiming Enables Cross-Tenant Account Takeover"
url: https://erroneo.us/security/cve/CVE-2026-59151/
description: "CVE-2026-59151 (prowler-cloud (PyPI)): Prowler is a cloud security platform. Prior to 5.30.3, Prowler's SAML authentication flow trusted the email domain…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-07-10
date_modified: 2026-09-11
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-59151"
kev: false
cvss: 9.6
epss: 0.00534
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-59151: Prowler: SAML Domain Claiming Enables Cross-Tenant Account Takeover

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.5% , percentile 44: FIRST’s model estimates a 0.5% chance of exploitation activity in the next 30 days, higher than 44% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes prowler-cloud (PyPI) < 5.30.3, fixed in 5.30.3 . Check your lockfile, including transitive dependencies.

## What it is

Prowler 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.

## Affected packages

- PyPI `prowler-cloud` < 5.30.3 → fixed: 5.30.3

## Affected products (CVE record)

- prowler-cloud prowler: < 5.30.3

## Severity

- GitHub_M CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.53% probability of exploitation activity in the next 30 days; percentile 44.

## Sources

- [GitHub Advisory GHSA-h8m9-jgf8-vwvp](https://github.com/advisories/GHSA-h8m9-jgf8-vwvp)
- [CVE.org record CVE-2026-59151](https://www.cve.org/CVERecord?id=CVE-2026-59151)
- [NVD entry CVE-2026-59151](https://nvd.nist.gov/vuln/detail/CVE-2026-59151)
- [github.com](https://github.com/prowler-cloud/prowler/security/advisories/GHSA-h8m9-jgf8-vwvp)
- [github.com](https://github.com/prowler-cloud/prowler/pull/11650)
- [github.com](https://github.com/prowler-cloud/prowler/commit/bf3b5c2ba713e533014927141b64948c82c8f32e)
- [github.com](https://github.com/prowler-cloud/prowler/commit/f5ff30ad175bd2edf02cd28872653c1cda5867b7)
- [github.com](https://github.com/prowler-cloud/prowler/releases/tag/5.30.3)
- [github.com](https://github.com/pypa/advisory-database/tree/main/vulns/prowler-cloud/PYSEC-2026-3725.yaml)

---
Source page: https://erroneo.us/security/cve/CVE-2026-59151/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt