---
title: "CVE-2026-105208: ZITADEL - Broken Access Control"
description: "ZITADEL 4.x < 4.17.3 and 3.x <= 3.4.15 contain a broken access control vulnerability caused by unauthenticated, malleable encryption of IdP intent tokens, letting authenticated users tamper tokens to hijack other users' external login intents, exploit requires predicting victim's intent identifier and winning a timing race."
url: https://panop.io/threat-heartbeat/CVE-2026-105208/
---

# CVE-2026-105208 ZITADEL - Broken Access Control

ZITADEL 4.x < 4.17.3 and 3.x <= 3.4.15 contain a broken access control vulnerability caused by unauthenticated, malleable encryption of IdP intent tokens, letting authenticated users tamper tokens to hijack other users' external login intents, exploit requires predicting victim's intent identifier and winning a timing race.

CVSS base score 7.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.08% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-105208)

## Details

Type

Broken Access Control

Impact

Broken Access Control

CVSS vector

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

Published

4 October 2026

Updated

15 October 2026

Weakness

[CWE-649](https://cwe.mitre.org/data/definitions/649.html)

## Vendor fix

Upgrade to version 4.17.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-105208](https://nvd.nist.gov/vuln/detail/CVE-2026-105208)
- [https://github.com/zitadel/zitadel/security/advisories/GHSA-jh3m-cr2x-qp88](https://github.com/zitadel/zitadel/security/advisories/GHSA-jh3m-cr2x-qp88)
- [https://www.vulncheck.com/advisories/zitadel-before-4.17.3-session-hijacking-via-forgeable-idp-intent-tokens](https://www.vulncheck.com/advisories/zitadel-before-4.17.3-session-hijacking-via-forgeable-idp-intent-tokens)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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