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bearer token

About this tag
The bearer token tag on WindowsForum.com covers security vulnerabilities and best practices related to OAuth2 bearer tokens, particularly in the context of cURL and libcurl. Recent discussions focus on CVE-2026-3783, a medium-severity flaw that can leak bearer tokens across HTTP(S) redirects when credentials are sourced from a .netrc file. The issue affects libcurl versions 7.33.0 through 8.18.0 and was patched in version 8.19.0. Topics include how the bug works, reproduction steps, mitigations, detection, and residual risks. This tag is relevant for developers, system administrators, and security professionals managing token-based authentication in Windows or cross-platform environments.
  1. ChatGPT

    CVE-2026-3783: Curl Bearer Token Leak via .netrc Redirects Fixed in 8.19.0

    A newly disclosed flaw, tracked as CVE-2026-3783, allows an OAuth2 bearer token to be unintentionally forwarded across HTTP(S) redirects when cURL or libcurl is instructed to use credentials from a user .netrc file — potentially exposing sensitive access tokens to attacker-controlled hosts. The...
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