Insertion of Sensitive Information Into Sent Data Affecting @angular/common package, versions <19.2.16>=20.0.0-next.0 <20.3.14>=21.0.0-next.0 <21.0.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-ANGULARCOMMON-14135651
- published27 Nov 2025
- disclosed26 Nov 2025
- creditAKileX
Introduced: 26 Nov 2025
CVE-2025-66035 (opens in a new tab)How to fix?
Upgrade @angular/common to version 19.2.16, 20.3.14, 21.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the HttpClient which has a built-in XSRF protection mechanism. An attacker can obtain sensitive authentication tokens by crafting requests using protocol-relative URLs that cause the token to be sent to domains under the attacker's control.
Note: This is only exploitable if XSRF protection is enabled and the application allows requests to protocol-relative URLs.
Workaround
This vulnerability can be mitigated by avoiding the use of protocol-relative URLs (those starting with //) in requests and ensuring all backend communication URLs are either relative paths or fully qualified, trusted absolute URLs.