CVE-2022-32221

When doing HTTP(S) transfers, libcurl might erroneously use the read callback (CURLOPT_READFUNCTION) to ask for data to send, even when the CURLOPT_POSTFIELDS option has been set, if the same handle previously was used to issue a PUT request which used that callback. This flaw may surprise the appl...

CVE-2022-43552

A use after free vulnerability exists in curl

CVE-2022-43551

A vulnerability exists in curl

CVE-2019-5482

Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3.

CVE-2011-3389

The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera, and other products, encrypts data by using CBC mode with chained initialization vectors, which allows man-in-the-middle attackers to obtain plaintext HTTP...

CVE-2022-42916

In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host nam...

CVE-2022-35252

When curl is used to retrieve and parse cookies from a HTTP(S) server, itaccepts cookies using control codes that when later are sent back to a HTTPserver might make the server return 400 responses. Effectively allowing a"sister site" to deny service to all siblings.

CVE-2023-23916

An allocation of resources without limits or throttling vulnerability exists in curl

CVE-2023-23914

A cleartext transmission of sensitive information vulnerability exists in curl

CVE-2023-46218

This flaw allows a malicious HTTP server to set "super cookies" in curl thatare then passed back to more origins than what is otherwise allowed orpossible. This allows a site to set cookies that then would get sent todifferent and unrelated sites and domains. It could do this by exploiting a mixed ...

CVE-2019-5481

Double-free vulnerability in the FTP-kerberos code in cURL 7.52.0 to 7.65.3.

CVE-2023-38039

When curl retrieves an HTTP response, it stores the incoming headers so thatthey can be accessed later via the libcurl headers API. However, curl did not have a limit in how many or how large headers it wouldaccept in a response, allowing a malicious server to stream an endless seriesof headers and...

CVE-2021-22947

When curl >= 7.20.0 and

CVE-2023-23915

A cleartext transmission of sensitive information vulnerability exists in curl

CVE-2020-8177

curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources that can lead too overwriting a local file when the -J flag is used.

CVE-2021-22925

curl supports the -t command line option, known as CURLOPT_TELNETOPTIONSin libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending NEW_ENV variables, libcurlcould be made to pass on uninitialized data from a stack based b...

CVE-2021-22898

curl 7.7 through 7.76.1 suffers from an information disclosure when the -t command line option, known as CURLOPT_TELNETOPTIONS in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uni...

CVE-2021-22946

A user can tell curl >= 7.20.0 and

CVE-2024-2398

When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead lea...

CVE-2020-8284

A malicious server can use the FTP PASV response to trick curl 7.73.0 and earlier into connecting back to a given IP address and port, and this way potentially make curl extract information about services that are otherwise private and not disclosed, for example doing port scanning and service bann...

CVE-2022-27776

A insufficiently protected credentials vulnerability in fixed in curl 7.83.0 might leak authentication or cookie header data on HTTP redirects to the same host but another port number.

CVE-2020-8169

curl 7.62.0 through 7.70.0 is vulnerable to an information disclosure vulnerability that can lead to a partial password being leaked over the network and to the DNS server(s).

CVE-2025-0665

libcurl would wrongly close the same eventfd file descriptor twice when takingdown a connection channel after having completed a threaded name resolve.

CVE-2024-11053

When asked to both use a .netrc file for credentials and to follow HTTPredirects, curl could leak the password used for the first host to thefollowed-to host under certain circumstances. This flaw only manifests itself if the netrc file has an entry that matchesthe redirect target hostname but the ...

CVE-2022-27782

libcurl would reuse a previously created connection even when a TLS or SSHrelated option had been changed that should have prohibited reuse.libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse if one of them matches the setup. However, several TLS andSSH s...

CVE-2019-5435

An integer overflow in curl's URL API results in a buffer overflow in libcurl 7.62.0 to and including 7.64.1.

CVE-2023-46219

When saving HSTS data to an excessively long file name, curl could end upremoving all contents, making subsequent requests using that file unaware ofthe HSTS status they should otherwise use.

CVE-2022-27780

The curl URL parser wrongly accepts percent-encoded URL separators like '/'when decoding the host name part of a URL, making it a different URL usingthe wrong host name when it is later retrieved.For example, a URL like http://example.com%2F127.0.0.1/, would be allowed bythe parser and get transpos...

CVE-2023-28322

An information disclosure vulnerability exists in curl

CVE-2018-1000007

libcurl 7.1 through 7.57.0 might accidentally leak authentication data to third parties. When asked to send custom headers in its HTTP requests, libcurl will send that set of headers first to the host in the initial URL but also, if asked to follow redirects and a 30X HTTP response code is returned...

CVE-2018-16842

Curl versions 7.14.1 through 7.61.1 are vulnerable to a heap-based buffer over-read in the tool_msgs.c:voutf() function that may result in information exposure and denial of service.

CVE-2024-8096

When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it might fail to detect some OCSP problems and instead wrongly consider the response as fine. If the returned status reports another error than ...

CVE-2021-22922

When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and thecli...

CVE-2021-22923

When curl is instructed to get content using the metalink feature, and a user name and password are used to download the metalink XML file, those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrar...

CVE-2024-0853

curl inadvertently kept the SSL session ID for connections in its cache even when the verify status (OCSP stapling ) test failed. A subsequent transfer tothe same hostname could then succeed if the session ID cache was still fresh, which then skipped the verify status check.

CVE-2024-9681

When curl is asked to use HSTS, the expiry time for a subdomain mightoverwrite a parent domain's cache entry, making it end sooner or later thanotherwise intended. This affects curl using applications that enable HSTS and use URLs with theinsecure HTTP:// scheme and perform transfers with hosts lik...

CVE-2024-2004

When a protocol selection parameter option disables all protocols without adding any then the default set of protocols would remain in the allowed set due to an error in the logic for removing protocols. The below command would perform a request to curl.se with a plaintext protocol which has been e...

CVE-2022-35260

curl can be told to parse a .netrc file for credentials. If that file endsin a line with 4095 consecutive non-white space letters and no newline, curlwould first read past the end of the stack-based buffer, and if the readworks, write a zero byte beyond its boundary.This will in most cases cause a ...

CVE-2024-2466

libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, when built to use mbedTLS. libcurl would wrongly avoid using the set hostname function when the specified hostname was given as an IP address, therefore completely skipping the certificate che...

CVE-2018-1000120

A buffer overflow exists in curl 7.12.3 to and including curl 7.58.0 in the FTP URL handling that allows an attacker to cause a denial of service or worse.

CVE-2022-27781

libcurl provides the CURLOPT_CERTINFO option to allow applications torequest details to be returned about a server's certificate chain.Due to an erroneous function, a malicious server could make libcurl built withNSS get stuck in a never-ending busy-loop when trying to retrieve thatinformation.

CVE-2025-0167

When asked to use a .netrc file for credentials and to follow HTTPredirects, curl could leak the password used for the first host to thefollowed-to host under certain circumstances. This flaw only manifests itself if the netrc file has a default entry thatomits both login and password. A rare circu...

CVE-2022-32206

curl

CVE-2025-0725

When libcurl is asked to perform automatic gzip decompression ofcontent-encoded HTTP responses with the CURLOPT_ACCEPT_ENCODING option,using zlib 1.2.0.3 or older , an attacker-controlled integer overflow wouldmake libcurl perform a buffer overflow.

CVE-2022-32208

When curl

CVE-2022-42915

curl before 7.86.0 has a double free. If curl is told to use an HTTP proxy for a transfer with a non-HTTP(S) URL, it sets up the connection to the remote server by issuing a CONNECT request to the proxy, and then tunnels the rest of the protocol through. An HTTP proxy might refuse this request (HTT...

CVE-2023-27534

A path traversal vulnerability exists in curl

CVE-2018-1000301

curl version curl 7.20.0 to and including curl 7.59.0 contains a CWE-126: Buffer Over-read vulnerability in denial of service that can result in curl can be tricked into reading data beyond the end of a heap based buffer used to store downloaded RTSP content.. This vulnerability appears to have bee...

CVE-2022-27774

An insufficiently protected credentials vulnerability exists in curl 4.9 to and include curl 7.82.0 are affected that could allow an attacker to extract credentials when follows HTTP(S) redirects is used with authentication could leak credentials to other services that exist on different protocols ...

CVE-2023-28321

An improper certificate validation vulnerability exists in curl