CVE-2026-103030
highDio is a powerful HTTP client for Dart and Flutter.
Dio is a powerful HTTP client for Dart and Flutter. From 1.0.0 until 2.8.0, dio_http2_adapter follows redirects in Http2Adapter._fetch by copying the original RequestOptions.headers into the redirected HTTP/2 request without comparing the source and destination origins. A server contacted by an application can return a cross-origin Location redirect to a different-origin destination, which then receives preserved Authorization, Cookie, and Proxy-Authorization headers because RequestOptions.copyWith retains the full header map. The issue applies when applications use Http2Adapter for authenticated requests, and redirect following is enabled by default. This issue is fixed in version 2.8.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/cfug/dio/commit/9d7ac913340084f3b4987b121e076f28d637a81e security-advisories@github.com
- https://github.com/cfug/dio/releases/tag/http2_adapter_v2.8.0 security-advisories@github.com
- https://github.com/cfug/dio/security/advisories/GHSA-cr65-55v9-xhvv security-advisories@github.com
- https://github.com/cfug/dio/security/advisories/GHSA-cr65-55v9-xhvv 134c704f-9b21-4f2e-91b3-4a467353bcc0