How severe is CVE-2026-29191?

CVE-2026-29191 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-29191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-29191?

CVE-2026-29191 affects Zitadel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-29191?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-29191 have an EU (EUVD) identifier?

Yes. CVE-2026-29191 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10148.

When was CVE-2026-29191 published?

CVE-2026-29191 was published on 2026-03-07 and last updated on 2026-06-17.

CVE-2026-29191

CVE-2026-29191 is a critical-severity vulnerability in Zitadel with a CVSS 3.x base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.3)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10148
Weakness: CWE-79
Affected product: Zitadel
Published: 2026-03-07
Last modified: 2026-06-17

Description

ZITADEL is an open source identity management platform. From version 4.0.0 to 4.11.1, a vulnerability in Zitadel's login V2 interface was discovered that allowed a possible account takeover via XSS in /saml-post Endpoint. This issue has been patched in version 4.12.0.

Frequently asked questions

What is CVE-2026-29191?: ZITADEL is an open source identity management platform. From version 4.0.0 to 4.11.1, a vulnerability in Zitadel's login V2 interface was discovered that allowed a possible account takeover via XSS in /saml-post Endpoint. This issue has been patched in version 4.12.0.
How severe is CVE-2026-29191?: CVE-2026-29191 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-29191 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-29191?: CVE-2026-29191 affects Zitadel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-29191?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-29191 have an EU (EUVD) identifier?: Yes. CVE-2026-29191 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10148.
When was CVE-2026-29191 published?: CVE-2026-29191 was published on 2026-03-07 and last updated on 2026-06-17.

References

https://github.com/zitadel/zitadel/security/advisories/GHSA-pr34-2v5x-6qjq

Affected products (1)

cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*

More vulnerabilities in Zitadel

CVE-2025-64717 — Critical (CVSS 9.8): ZITADEL is an open source identity management platform. Starting in version 2.50.0 and prior to versions 2.71.19,…
CVE-2025-64103 — Critical (CVSS 9.8): Starting from 2.53.6, 2.54.3, and 2.55.0, Zitadel only required multi factor authentication in case the login policy…
CVE-2025-64102 — Critical (CVSS 9.8): Zitadel is open-source identity infrastructure software. Prior to 4.6.0, 3.4.3, and 2.71.18, an attacker can perform an…
CVE-2025-67494 — Critical (CVSS 9.3): ZITADEL is an open-source identity infrastructure tool. Versions 4.7.0 and below are vulnerable to an unauthenticated,…
CVE-2025-27507 — Critical (CVSS 9.0): The open-source identity infrastructure software Zitadel allows administrators to disable the user self-registration.…
CVE-2025-53895 — High (CVSS 8.8): ZITADEL is an open source identity management system. Starting in version 2.53.0 and prior to versions 4.0.0-rc.2,…

All CVEs affecting Zitadel →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →