curl: ARG_CLEAR credential scrubbing wipes only UTF-8 copies on Windows Unicode builds

cleanarg operates on char str, which is the UTF-8 copy allocated by converttchartoUTF8. It has no reference to the original wchart argv element. c / toolgetparam.c:632 / static void cleanargchar str / now that getstr has copied the contents of nextarg, wipe the next argument out so that the...

curl: curl_share TOCTOU > RCE via Curl_llist _dtor Function Pointer Hijack

Summary: CURLSH the curl share handle allows multiple easy handles to share state — cookies, DNS cache, SSL sessions, connection cache — across threads. The share is protected by optional user-supplied mutex callbacks CURLSHOPTLOCKFUNC / CURLSHOPTUNLOCKFUNC. When a caller invokes curlsharesetopts...

curl: TLS session cache case-folds CA paths and bypasses the active trust profile

curl 8.21.0 case-folds the entire TLS session-cache peer key, so two distinct CA files whose Unix paths differ only by case can share a TLS session ticket. At lib/vtls/vtlsscache.c:723, curlstrequal compares keys that include case-sensitive CA, CRL, and issuer paths, even though...

curl: wolfSSL backend disables hostname verification when CURLOPT_SSL_VERIFYPEER is 0

Summary When curl is built against wolfSSL, setting CURLOPTSSLVERIFYPEER=0 causes a hostname-mismatched certificate to be accepted even though CURLOPTSSLVERIFYHOST remains at its default enabled setting. I built wolfSSL from source, built curl against it, and connected to a TLS server presenting ...

curl: RTSP CRLF injection in libcurl allows CURLOPT_RTSP_* values to inject commands into independent sessions

Summary libcurl's RTSP code interpolates the values of CURLOPTRTSPSTREAMURI, CURLOPTRTSPTRANSPORT, and CURLOPTRTSPSESSIONID directly into the RTSP request text with no check for embedded CR/LF, so a value containing \r\n splits one intended RTSP operation into multiple independent RTSP requests o...

curl: libcurl Digest/NTLM authentication ignores an explicit Authorization header

Summary When an application sets an explicit Authorization header via CURLOPTHTTPHEADER while libcurl also has credentials configured and HTTP Digest or NTLM authentication is selected/challenged, libcurl does not honor the application's header as a replacement — it sends its own internally...

curl: Domainless COOKIEFILE cookie leaks to unrelated IP-literal hosts

When curl loads a cookie file written as raw HTTP Set-Cookie: header lines and a line has no Domain attribute, the cookie is stored with co-domain == NULL, because a file import has no request-host to scope it to. On the send side, Curlcookiegetlist accepts any cookie in the bucket whose domain i...

Basecamp: One-click cross-account JavaScript execution steals a victim write token through Turbo pagination and unattached Active Storage HTML

A cross-account JavaScript execution vulnerability was discovered in a web application that allowed arbitrary code execution when a victim opened a crafted public board URL. An attacker with a separate account could leverage this vulnerability to steal the victim's write access token through a...

curl: libcurl cache updates follow symlinks and truncate their targets

Summary: When curl updates an HSTS, Alt-Svc, or cookie cache, it opens the supplied path with "w" before validating it, so a symlink path can truncate the file it targets. Root cause: Curlfopen calls curlxfopenfilename, "w" before checking the path or creating the safe temporary file, and fopen...

curl: Windows SSPI connection-pool probe can reuse a connection under the wrong user

Summary : A fresh transfer can reuse a keep-alive connection authenticated under another Windows user because the SSPI isolation check trusts a connection ID that a health probe can set. Root cause : Curlcpoolconnseemshealthy calls Curlattachconnection, which sets data-state.recentconnid, while...

WordPress: Author → arbitrary file deletion anywhere on disk (site takeover) via `POST /wp/v2/media/<id>/finalize` poisoning `_wp_attachment_metadata`

A vulnerability was discovered in the WordPress media processing functionality. This vulnerability allowed an authenticated author to delete arbitrary files on the server. The vulnerability was caused by insufficient input validation in the finalizeitem function, which allowed an attacker to...

WordPress: Author → stored XSS in wp-admin: unescaped sub-size filename from attachment metadata breaks out of the `src` attribute in `get_media_item()`

A vulnerability was discovered in the WordPress media upload and finalize endpoints. An author could upload a crafted image with a malicious filename, which was then stored verbatim by the endpoint and rendered without proper escaping in the WordPress admin media library. This could allow the...

Myndr: Myndr CORS Misconfiguration

The CORS configuration on admin.myndr.net allowed any .myndr.net subdomain to read authenticated admin panel responses, including CSRF nonces and session data. This vulnerability could have been exploited to take over admin accounts...

Myndr: CORS Misconfiguration / Broken Access Control

A CORS misconfiguration was discovered on the admin panel that allowed any website hosted on a subdomain of the target organization to read authenticated admin responses, including CSRF nonces and session data. This vulnerability could have enabled full admin account takeover through a CSRF attac...

curl: CVE-2026-19931: Negotiate ambient user conn reuse

Summary On Windows with SSPI/Negotiate, curl 8.21.0 can reuse a connection authenticated with ambient credentials for a later request using different explicit credentials. In urlmatchauthnego, the credential comparison is skipped when conn-creds == NULL. This allows a connection authenticated as...

curl: URL API: triple-slash parses path segment as hostname

Summary libcurl's URL API misparses http:///host/path. Per RFC 3986, the authority between // and / is empty, so /host/path is the path. But parseurl in lib/urlapi.c treats the first segment as the hostname. On line 1087, the slash counter i reaches 3, which is within the valid 1-3 range, and hos...

curl: Cookie jar load skips public suffix check on PSL builds

On curl 8.21.0 with libpsl official curl.se 8.21.06 win64, Features: PSL, HTTP Set-Cookie: Domain=co.uk is dropped in verbose. The same cookie loaded from a Netscape jar file or a Set-Cookie: line in that file is accepted and later sent to unrelated hosts under the suffix bank.co.uk, other.co.uk...

curl: curl Missing Sec-WebSocket-Accept Verification Enables MITM WebSocket Session Hijacking

Summary curl's Curlwsaccept function in lib/ws.c processes the 101 Switching Protocols response to a client WebSocket upgrade request. RFC 6455 Section 4.1 mandates that the client MUST verify the Sec-WebSocket-Accept response header by computing the SHA-1 hash of the concatenation of the...

curl: CVE-2026-18924: HTTP/2 server push UAF

A vulnerability was discovered in libcurl versions 8.21.0 and later, where a use-after-free issue could occur in the HTTP/2 server push functionality. The vulnerability was caused by the fact that when a pushed transfer ends, the connection's pool is not properly handled, leading to the freed...

MariaDB: Heap Use-After-Free in Materialized_cursor::open via SYS_REFCURSOR Array Reallocation

A heap-use-after-free vulnerability was identified in the cursor handling mechanism of the database server. The vulnerability existed in the cursor opening function where array reallocation during nested cursor operations caused dangling pointer references. When a cursor's SELECT statement invoke...