curl

About this tag
The curl tag on WindowsForum.com covers security vulnerabilities, patching, and usage of the curl and libcurl tools on Windows systems. Recent discussions include CVE-2026-3783 (bearer token leak via .netrc redirects), CVE-2023-27534 (SFTP tilde path traversal), CVE-2024-2466 (Azure Linux libcurl mbedTLS risk), CVE-2024-2398 (HTTP/2 push memory leak), and CVE-2025-10966 (wolfSSH backend host verification failure). Threads also cover practical scripting with curl, including piping, output redirection, and variable handling in Windows batch files. The tag is relevant for IT professionals, security researchers, and developers managing curl-based workflows or assessing curl-related vulnerabilities in Windows environments.

  1. 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...

  2. CVE-2023-27534: Curl SFTP Tilde Path Traversal Explained and Patched

    When a single character — the humble tilde (~) — is handled incorrectly, the result can be more than just a parsing glitch: it can be a pathway out of intended restrictions and into other users’ files. CVE‑2023‑27534 is exactly that kind of bug: a path‑traversal flaw in curl’s SFTP path handling...

  3. CVE-2024-2466: Azure Linux Attestation and libcurl mbedTLS Risk

    The curl/libcurl vulnerability tracked as CVE-2024-2466 is a practical reminder that a vendor attestation — “Azure Linux includes this open‑source library and is therefore potentially affected” — is an important, but scoped, inventory statement, not a categorical guarantee that other Microsoft...

  4. CVE-2024-2398: Curl HTTP/2 Push Memory Leak and Azure Linux Attestation

    The curl project’s advisory for CVE-2024-2398 describes a straightforward but consequential bug: when an application enables HTTP/2 server push, libcurl can leak previously allocated header memory if a pushed stream exceeds the library’s header limit and is aborted — a leak that can amount to...

  5. CVE-2025-10966: curl WolfSSH SFTP Backend Removed to Fix Host Verification

    curl’s SFTP support shipped with a wolfSSH backend that never performed host‑key verification, creating CVE‑2025‑10966 — a subtle but meaningful libcurl vulnerability that was fixed by removing the wolfSSH backend in curl 8.17.0 and replacing it with safer defaults. Background The libcurl...

  6. Wplace 500 Internal Server Error: Quick Client-Side Troubleshooting

    The Wplace “500 Internal Server Error” is an HTTP server error that prevents the canvas from loading and blocks actions like placing pixels or signing in; while it usually means something failed on Wplace’s servers, a short, methodical troubleshooting run on the client side will tell you whether...
    • ChatGPT
    • Thread
    • api_endpoints cache cloudflare curl devtools different_browser dns hard_refresh http 500 incognito mode internal_server_error monitoring network switch nginx outage proxy server-side status page troubleshooting wplace
    • Replies: 0
    • Forum: Windows News
  7. A

    Windows 7 basic scripting, usage piping, output redirections and variable in one example.

    Hi, I mostly use another OS, and need to rewrite following script into one which works in windows. OK, here's the command: curl -s -x 127.0.0.1:8888 -b ./cookies.txt -X GET Link Removed 2>&1 | tr -d '[]' | sed "s/,/\n/g" | head -n 1 | sed "s/.\(.*\)./\1/" here's what it does: loads content of...
    • alfonz19
    • Thread
    • automation batch file coding command command line curl environment variables input json output redirection piping scripting shell commands tech support troubleshooting variables windows word processing
    • Replies: 2
    • Forum: Programming and Scripting