CVE-2025-66035Angular HTTP Client Has XSRF Token Leakage via Protocol-Relative URLs
Updated under an hour ago ()
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It affects angular and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.16, 20.3.14, and 21.0.1, there is a XSRF token leakage via protocol-relative URLs in angular HTTP clients. The vulnerability is a Credential Leak by App Logic that leads to the unauthorized disclosure of the Cross-Site Request Forgery (XSRF) token to an attacker-controlled domain. Angular's HttpClient has a built-in XSRF protection mechanism that works by checking if a request URL starts with a protocol (http:// or https://) to determine if it is cross-origin. If the URL starts with protocol-relative URL (//), it is incorrectly treated as a same-origin request, and the XSRF token is automatically added to the X-XSRF-TOKEN header. This issue has been patched in versions 19.2.16, 20.3.14, and 21.0.1. A workaround for this issue involves avoiding using protocol-relative URLs (URLs starting with //) in HttpClient requests. All backend communication URLs should be hardcoded as relative paths (starting with a single /) or fully qualified, trusted absolute URLs.
- CVSS
- 7.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
- Weakness (CWE)
- CWE-201, CWE-359
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Jun 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
angular angular angular:angular (from the name) | from 21.0.0-next.0, < 21.0.1; from 20.0.0-next.0, < 20.3.14; before 19.2.16 | CNA record |
Siemens RUGGEDCOM RST2428P siemens:ruggedcom_rst2428p (from the name) | before V4.0 | CISA ADP |
Siemens SIDIS Prime siemens:sidis_prime (from the name) | before V4.0.800 | CISA ADP |
References
- https://github.com/angular/angular/security/advisories/GHSA-58c5-g7wp-6w37x-refsource-confirm
- https://github.com/angular/angular/commit/0276479e7d0e280e0f8d26fa567d3b7aa97a516fx-refsource-misc
- https://github.com/angular/angular/commit/05fe6686a97fa0bcd3cf157805b3612033f975bcx-refsource-misc
- https://github.com/angular/angular/commit/3240d856d942727372a705252f7c8c115394a41ex-refsource-misc
- https://github.com/angular/angular/releases/tag/19.2.16x-refsource-misc
- https://github.com/angular/angular/releases/tag/20.3.14x-refsource-misc
- https://github.com/angular/angular/releases/tag/21.0.1x-refsource-misc
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html
- https://cert-portal.siemens.com/productcert/html/ssa-485750.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.