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CVE-2026-50169 angular CVE debrief

CVE-2026-50169 is a medium-severity vulnerability affecting the Angular service worker. Prior to versions 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23, the service worker incorrectly reconstructs requests, stripping client-defined redirect policies. This can lead to unintended proxy behavior, potentially exposing sensitive data. The vulnerability has a CVSS score of 5.7 and is classified as CWE-200, CWE-441, and CWE-524.

Vendor
angular
Product
Unknown
CVSS
MEDIUM 5.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-22
Original CVE updated
2026-07-09
Advisory published
2026-06-22
Advisory updated
2026-07-09

Who should care

Developers using Angular service workers, especially those handling sensitive data or strict request policies, should be aware of this vulnerability. Web applications with client-side requests and strict redirect policies are at risk. Security teams monitoring for potential credential exposure or data leakage should prioritize patching.

Technical summary

The Angular service worker intercepts network requests for matched assets and reconstructs a new Request object using an internal helper function. During this reconstruction, the helper function strips the strict, client-defined request redirect policy configuration, falling back to the browser's default 'follow' strategy. This can bypass client-side requests with strict policies, automatically following HTTP 3xx redirects to other destinations. The vulnerability affects versions prior to 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23.

Defensive priority

Patching to versions 22.0.0-rc.2, 21.2.15, 20.3.22, or 19.2.23 is recommended. Review client-side request policies and consider implementing compensating controls to monitor and restrict sensitive data exposure.

Recommended defensive actions

  • Patch to versions 22.0.0-rc.2, 21.2.15, 20.3.22, or 19.2.23
  • Review and update client-side request policies
  • Monitor for potential credential exposure or data leakage
  • Implement compensating controls to restrict sensitive data exposure
  • Verify vendor remediation workflow and exception tracking

Evidence notes

The CVE record and NVD detail provide official information on the vulnerability. The source item URL offers additional context from the NVD database. References to issue tracking and patch information are available.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50169 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50169

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50169 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50169

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.