The Angular SSR is a server-rise rendering tool for Angular applications. From 19.0.0-next.0 to before 19.2.25, 20.3.25, 21.2.9, and 22.0.0-next.7, a vulnerability exists in the X-Forwarded-Prefix header processing logic within Angular SSR. The internal validation mechanism fails to properly account for URL-encoded characters, specifically dots (%2e%2e). This allows an attacker to bypass security filters by injecting encoded path traversal sequences that are later decoded and utilized by the application logic.
When an Angular SSR application is configured to trust proxy headers and is deployed behind a proxy that forwards the X-Forwarded-Prefix header without prior sanitization, an attacker can provide a payload such as /%2e%2e/evil. This vulnerability is fixed in19.2.25, 20.3.25, 21.2.9, and 22.0.0-next.7.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
angular angular-cli affected
Version Status Constraints
>= 22.0.0-next.0, < 22.0.0-next.7 affected —
>= 21.0.0-next.0, < 21.2.9 affected —
>= 20.0.0-next.0, < 20.3.25 affected —
>= 19.0.0-next.0, < 19.2.25 affected —

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Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-69xr-m8h6-h664 Angular SSR has Open Redirect and Request Steering via Encoded X-Forwarded-Prefix
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/angular/angular-cli/pull/33031 cve-icon cve-icon
https://github.com/angular/angular-cli/security/advisories/GHSA-69xr-m8h6-h664 cve-icon cve-icon
History

Wed, 13 May 2026 21:45:00 +0000

Type Values Removed Values Added
Description The Angular SSR is a server-rise rendering tool for Angular applications. From 19.0.0-next.0 to before 19.2.25, 20.3.25, 21.2.9, and 22.0.0-next.7, a vulnerability exists in the X-Forwarded-Prefix header processing logic within Angular SSR. The internal validation mechanism fails to properly account for URL-encoded characters, specifically dots (%2e%2e). This allows an attacker to bypass security filters by injecting encoded path traversal sequences that are later decoded and utilized by the application logic. When an Angular SSR application is configured to trust proxy headers and is deployed behind a proxy that forwards the X-Forwarded-Prefix header without prior sanitization, an attacker can provide a payload such as /%2e%2e/evil. This vulnerability is fixed in19.2.25, 20.3.25, 21.2.9, and 22.0.0-next.7.
Title Angular SSR: Open Redirect and Request Steering via Encoded X-Forwarded-Prefix
Weaknesses CWE-22
CWE-601
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-13T21:23:59.260Z

Reserved: 2026-05-06T14:40:00.954Z

Link: CVE-2026-44437

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-13T22:16:44.710

Modified: 2026-05-13T22:16:44.710

Link: CVE-2026-44437

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T22:30:06Z

Weaknesses