CVE-2026-44437
📛 CVE Title
Angular SSR: Open Redirect and Request Steering via Encoded X-Forwarded-Prefix
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- GitHub_M
- CVSS severity
- MEDIUM
- CVSS score
- 6.9 / 10
- CVSS 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- Effective score
- 6.9 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-22,CWE-601 - Reserved
- 2026-05-06
- Published
- 2026-05-13 23:23 UTC
- Last updated
- 2026-05-14 15:35 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/44xxx/CVE-2026-44437.json
- Linked Threat
- CVE-2026-44437 — CVE-2026-44437
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-13 22:16:44 UTC
- NVD last modified
- 2026-05-14 18:17:11 UTC
- EPSS score
- 0.0006 (probability of exploitation in next 30 days)
- EPSS percentile
- 19.83% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 08:45 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-30191 - Assigner
- GitHub_M
- Published
- May 13, 2026, 9:23:59 PM
- Updated
- May 14, 2026, 1:35:18 PM
- EUVD base score (CVSS 4.0)
-
6.9 / 10
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 - EUVD-reported EPSS
- 0.0300
- Vendors
- angular
- Products
-
angular-cli (21.0.0-next.0, < 21.2.9)angular-cli (20.0.0-next.0, < 20.3.25)angular-cli (22.0.0-next.0, < 22.0.0-next.7)angular-cli (19.0.0-next.0, < 19.2.25)
- Aliases
-
GHSA-69xr-m8h6-h664
ENISA 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.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| angular | angular-cli |
>= 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)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
- https://github.com/angular/angular-cli/security/advisories/GHSA-69xr-m8h6-h664 x_refsource_CONFIRM
- https://github.com/angular/angular-cli/pull/33031 x_refsource_MISC
MITRE references (2) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
- https://github.com/angular/angular-cli/pull/33031 x_refsource_MISC
- https://github.com/angular/angular-cli/security/advisories/GHSA-69xr-m8h6-h664 x_refsource_CONFIRM
Web references (3)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2026-44437 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-44437 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://github.com/angular/angular-cli/pull/33031 security-advisories@github.com
- https://github.com/angular/angular-cli/security/advisories/GHSA-69xr-m8h6-h664 security-advisories@github.com
Remediations (17)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:app.opencve.io
Remediation No vendor fix or workaround currently provided. OpenCVE Recommended Actions Upgrade angular-cli to at least 19.2.25, 20.3.25, 21.2.9, or 22.0.0‑next.7 where the X‑Forwarded‑Prefix validation is fixed Disable the "trust proxy" configuration or remove the X‑Forwarded‑Prefix header handling if it is not required for your ...
2026-05-23 20:54 UTC -
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-23 20:54 UTC -
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-23 20:54 UTC -
web:docs.oracle.com
Oracle Critical Patch Update (CPU) April 2026 for Oracle Java SE Services: Java Management Release Date: April 21, 2026
2026-05-23 20:54 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-05-23 20:54 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-23 20:54 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-23 20:54 UTC -
web:www.pcworld.com
This month's Patch Tuesday includes an actively exploited Office zero-day vulnerability and several critical RCE bugs in Windows and Remote Desktop.
2026-05-23 20:54 UTC -
web:www.securityweek.com
Oracle on Tuesday announced the release of 481 new security patches as part of its April 2026 Critical Patch Update (CPU). Across the 28 product families that received security updates, more than 300 patches address vulnerabilities that are remotely exploitable without authentication.
2026-05-23 20:54 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-23 20:54 UTC -
web:integsec.com
CVE‑2026‑44277 is a critical‑severity vulnerability in Fortinet's FortiAuthenticator identity‑and‑access‑management platform that allows an unauthenticated attacker to execute arbitrary code or commands on the appliance. This single vulnerability can put your corporate identity store, authentication flows, and downstream business systems into an attacker's hands, making it a ...
2026-05-26 02:56 UTC -
web:nvd.nist.gov
The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...
2026-05-26 02:56 UTC -
web:windowsforum.com
Microsoft's Fastest Fix Is a Mitigation , Not a Patch The important detail in Microsoft's May 14 notice is that there is no permanent Exchange security update available yet for CVE - 2026 -42897. Microsoft says it is working on one and will release it later for affected supported paths, but today's defensive action is mitigation .
2026-05-26 02:56 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
2026-05-26 02:56 UTC -
web:www.bugcrowd.com
Vulnerability mitigation is typically considered a temporary or interim solution. While mitigation measures can reduce the immediate risk associated with vulnerabilities, they may not provide a permanent fix . Organizations should aim to prioritize and plan for complete vulnerability remediation whenever feasible and allocate resources accordingly.
2026-05-26 02:56 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-26 02:56 UTC -
web:www.secure.com
Learn the difference between vulnerability remediation and mitigation , and how a risk-based strategy can strengthen your security posture.
2026-05-26 02:56 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-44437.json.
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