CVE-2022-32221

CVE-2022-32221 concerns curl/libcurl where the read callback (CURLOPT_READFUNCTION) may be used for POST data even after a PUT if the same handle was used for a PUT with that callback. This can cause sending the wrong data or memory errors on a subsequent POST. Connected advisories note this affe...

CVE-2022-43552

The CVE-2022-43552 vulnerability affects curl

CVE-2011-3389

CVE-2011-3389 is the BEAST information-disclosure vulnerability in TLS/SSL CBC-mode encryption, allowing a network attacker to glean plaintext headers under certain configurations (e.g., when CBC with chained IVs is used and the attacker can inject/observe traffic). The connected documents show m...

CVE-2022-43551

CVE-2022-43551 is a vulnerability in curl’s HSTS check that could allow bypassing HSTS and forcing a cleartext HTTP transfer. The issue occurs when the URL hostname uses IDN characters that are later ASCII-encoded during IDN processing (e.g., U+3002 IDEOGRAPHIC FULL STOP instead of U+002E). Curl ...

CVE-2019-5482

CVE-2019-5482 is a heap buffer overflow in curl/libcurl’s TFTP handler (tftp_receive_packet) affecting curl versions up to 7.65.3. Public advisories detail that a small TFTP blocksize can trigger overflow, potentially enabling DoS or arbitrary code execution. Public fixes exist across distributio...

CVE-2023-46218

CVE-2023-46218 affects curl and stems from a mixed-case domain verification flaw against the PSL. This can let a malicious HTTP server set “super cookies” that may be sent to unrelated origins, exploiting domain comparisons such as domain=co.UK with a curl.co.uk URL. The vulnerability is describe...

CVE-2022-35252

CVE-2022-35252 affects curl’s handling of cookies containing control codes; when such cookies are echoed back to a server, the server may return 400 responses, effectively enabling a “sister site” to deny service to other siblings. Public advisories confirm this is fixed in curl updates across se...

CVE-2022-42916

CVE-2022-42916 affects curl’s HSTS check: when hostnames contain IDN characters that map to ASCII (e.g., IDEOGRAPHIC FULL STOP U+3002), curl can bypass HSTS and end up using HTTP instead of HTTPS. This could lead to cleartext transmission if an HTTP URL is provided. The issue is tied to curl vers...

CVE-2023-23916

CVE-2023-23916 involves curl before 7.88.0 where an attacker could abuse the chained HTTP compression chain to create a degenerate decompression path. Although the cap on the number of links is per header, a malicious server can inject many headers to form an effectively unlimited decompression c...

CVE-2023-23914

CVE-2023-23914 affects curl before 7.88.0, related to cleartext transmission and HSTS handling. The issue occurs when multiple URLs are requested serially on the same command line, where the HSTS state may not be carried forward, causing curl to unexpectedly use insecure HTTP despite HTTPs in the...

CVE-2021-22947

CVE-2021-22947 affects curl when connecting to IMAP/POP3 servers using STARTTLS: multiple responses are cached before TLS, and after upgrading to TLS curl may trust pre‑TLS data, enabling a MITM injection of data. Affected releases range from curl 7.20.0 up to 7.78.0; exploitation details are not...

CVE-2020-8177

CVE-2020-8177 affects curl up to 7.70.0, where -J/--remote-header-name combined with -i/--include could allow a malicious server to overwrite a local file due to improper restriction of file names. Connected advisories confirm this vulnerability across distributions (Debian, CentOS, Alpine, Amazo...

CVE-2023-38039

CVE-2023-38039 affects curl; the vulnerability arises from unbounded header handling in HTTP responses, allowing an attacker to stream an endless header sequence and exhaust curl’s heap memory. The issue is caused by not enforcing a limit on the number/size of headers; impact is heap memory exhau...

CVE-2019-5481

CVE-2019-5481 is a double-free vulnerability in curl’s FTP-Kerberos code, affecting curl 7.52.0 through 7.65.3. Exploitation involves a malicious FTP server sending a very large data block, which can cause memory corruption leading to a crash or denial of service (DoS). Multiple connected advisor...

CVE-2021-22925

CVE-2021-22925 affects curl/libcurl’s TELNET OPTION handling (-t / CURLOPT_TELNETOPTIONS). A flaw in the option parser for NEW_ENV variables can cause uninitialized data from a stack buffer to be sent to the server, due to incorrect sscanf usage when parsing the provided string. This could reveal...

CVE-2024-2466

The libcurl package is vulnerable to a certificate validation bypass when built to use mbedTLS . When a host is specified as an IP address , libcurl incorrectly fails to call the hostname function, causing it to skip the server certificate check entirely. This affects all TLS protocols, including...

CVE-2023-23915

CVE-2023-23915 affects multiple packages (e.g., rust 1.59.0-1, mysql 8.0.32-1, cmake 3.21.4-3, tensorflow <2.16.1-1, rust <1.72.0-2, cmake <3.28.2-1, mysql =2.16.1-1, cmake >=3.28.2-1, mysql >=8.0.33-1) to resolve the issue. The initial curl CVE description documents a separate HST...

CVE-2024-11053

The curl package is vulnerable to a credential leak flaw (CVE-2024-11053 ) when configured to use a .netrc file for authentication and follow HTTP redirects. Under specific conditions—where the .netrc file contains an entry matching the redirect target hostname but omits either the password or bo...

CVE-2022-27776

CVE-2022-27776 is a curl vulnerability where credentials could be leaked during HTTP redirects to the same host on a different port. Root cause: insufficiently protected credentials in redirect handling. Impact: potential exposure of authentication or cookie headers. Affected: curl/libcurl across...

CVE-2024-2398

The libcurl library is vulnerable to a memory leak when an application enables HTTP/2 server push and the number of received push headers exceeds the 1000 limit. In this scenario, libcurl aborts the server push but fails to free all previously allocated headers, leading to a memory leak. This err...

CVE-2020-8284

CVE-2020-8284 affects curl's handling of FTP PASV responses, enabling a malicious FTP server to coax curl into connecting to an attacker-controlled IP/port and potentially reveal private services (port scanning, banner extraction). Affects curl prior to patched versions; multiple advisories refer...

CVE-2021-22898

CVE-2021-22898 affects curl before the patch levels that fix TELNET option handling. Specifically, curl 7.7–7.76.1 could disclose information when using the -t option (CURLOPT_TELNETOPTIONS) to send NEW_ENV variables due to a flaw in the option parser that passes uninitialized data from a stack b...

CVE-2025-0725

The libcurl library is vulnerable to an integer overflow when performing automatic gzip decompression of content-encoded HTTP responses with the CURLOPT_ACCEPT_ENCODING option, specifically when using zlib 1.2.0.3 or older . This flaw can lead to a buffer overflow . The vulnerability has been pat...

CVE-2021-22946

CVE-2021-22946 affects curl before 7.82.0 (and within 7.20.0–7.78.0 per description) where the --ssl-reqd option or CURLUSESSL controls could be bypassed if a server crafts a legitimate response, allowing curl to continue without TLS. Connected sources confirm this flaw exists across multiple eco...

CVE-2025-0665

The libcurl library is vulnerable to a double close of an eventfd file descriptor. This occurs when a connection channel is taken down after completing a threaded name resolve , causing the same resource descriptor to be released twice. This flaw is present in curl versions 7.10.5 through 8.11.1 ...

CVE-2023-28322

An information disclosure vulnerability exists in curl (versions <8.1.0) due to incorrect logic when reusing a handle for a POST request after a previous PUT request. If the CURLOPT_READFUNCTION was used during the PUT request, libcurl might erroneously use that same callback to request data t...

CVE-2020-8169

CVE-2020-8169 affects curl/libcurl 7.62.0–7.70.0. Root cause: libcurl could be tricked into prepending part of a password to the host name before DNS resolution, potentially leaking a partial password over the network and to DNS servers. Impact: information disclosure of partial credentials. Affe...

CVE-2023-46219

The CVE-2023-46219 entry concerns curl failing to preserve HSTS data when saving to an excessively long filename, which can cause curl to lose HSTS status for subsequent requests that rely on it. The issue is triggered by writing HSTS data to an overly long file path, resulting in removal of file...

CVE-2022-27782

CVE-2022-27782 affects curl/libcurl: it can reuse a previously created connection when TLS/SSH-related options were changed, due to incomplete configuration-matching checks. Connected advisories confirm this issue across multiple platforms (AIX, Amazon Linux, CloudLinux/CentOS, Cloud Foundry) and...

CVE-2022-22576

CVE-2022-22576 is an improper authentication vulnerability in curl 7.33.0 through 7.82.0 that may allow reuse of OAuth2-authenticated connections without confirming the credentials used for the transfer, affecting SASL-enabled protocols (SMPTP(S), IMAP(S), POP3(S), LDAP(S) via OpenLDAP). The root...

CVE-2019-5435

CVE-2019-5435 affects curl/libcurl: an integer overflow in curl_url_set() within the URL API can cause a heap/buffer overflow in libcurl versions from 7.62.0 up to 7.64.1. The issue exists on affected builds and can lead to memory corruption; 32‑bit considerations are described in related advisor...

CVE-2021-22922

CVE-2021-22922 affects curl’s Metalink download flow: when multiple URLs are provided, a content hash mismatch on a breached server is not discarded during download, allowing potentially malicious data to be kept on disk. Public advisories and vendor bulletins confirm patches in patched curl rele...

CVE-2022-27780

CVE-2022-27780 affects curl: the URL parser can wrongly decode percent-encoded separators in the host portion, causing a URL like http://example.com%2F127.0.0.1/ to be interpreted as http://example.com/127.0.0.1/, potentially bypassing filters. Affected software is curl (core library). The flaw’s...

CVE-2024-0853

CVE-2024-0853 affects curl by retaining SSL session IDs in the cache after an OCSP stapling verify status test fails, allowing a subsequent transfer to bypass verification if the session cache is still fresh. Connected documents confirm this is a curl vulnerability affecting multiple platforms an...

CVE-2024-8096

The curl package contains a vulnerability where it fails to correctly handle OCSP stapling (Certificate Status Request TLS extension) responses. When used to verify server certificates, curl might incorrectly treat responses with errors other than 'revoked' (such as 'unauthorized') as valid, pote...

CVE-2024-2004

The curl package is affected by CVE-2024-2004 , a logic error where disabling all protocols via a selection parameter leaves the default set active. This flaw is only triggered when a command explicitly disables all available protocols—a scenario deemed unlikely to occur in real-world use. The cu...

CVE-2024-9681

The CVE describes a vulnerability in curl where, when HSTS is used, a subdomain’s Strict-Transport-Security expiry can bleed into the parent domain, causing http://[example] to be redirected to HTTPS for an incorrect time window. This can cause HTTP requests to example.com to be unexpectedly serv...

CVE-2022-32208

CVE-2022-32208 affects curl when performing FTP transfers secured by krb5 prior to version 7.84.0. The vulnerability arises from how message verification failures are handled during krb5-secured FTP transfers, enabling a man-in-the-middle to go unnoticed and potentially inject data to the client....

CVE-2022-32206

CVE-2022-32206 affects curl

CVE-2025-0167

The curl package is vulnerable to a flaw where it could leak a password from a .netrc file to a followed-to host during HTTP redirects. This specific issue occurs only when the .netrc file contains a default entry that omits both the login and password, which is a rare circumstance. Impacted envi...

CVE-2022-27774

CVE-2022-27774 affects curl. The vulnerability is described as an insufficiently protected credentials issue where credentials could be leaked during HTTP(S) redirects when authentication is involved, potentially leaking to other hosts across different protocols or ports. Connected advisories sho...

CVE-2021-22923

CVE-2021-22923 affects curl's metalink feature: when downloading a metalink XML with user credentials, those credentials are subsequently passed to each server curls contacts, potentially leaking credentials to multiple endpoints. Technical details across sources confirm this credential exposure ...

CVE-2024-2379

The libcurl package is vulnerable to a security issue where it skips certificate verification for QUIC connections when built to use wolfSSL . The flaw occurs when the system is instructed to use an unknown or bad cipher or curve ; in this specific error path, the software accidentally skips veri...

CVE-2022-27781

CVE-2022-27781 affects libcurl builds using NSS; due to an erroneous function, a malicious server could cause libcurl to enter a never-ending busy-loop when retrieving certificate information, impacting availability. Affected advisories suggest upgrading curl/libcurl to a patched version (e.g., n...

CVE-2022-42915

CVE-2022-42915 affects curl. A double-free can occur in curl 7.77.0 and later when using an HTTP proxy for non-HTTP(S) URLs, if the proxy returns a non-200 status and the URL uses schemes such as dict, gopher, gophers, ldap, ldaps, rtmp, rtmps, or telnet. The error/cleanup path may trigger the me...

CVE-2018-16842

CVE-2018-16842 affects curl and libcurl versions 7.14.1–7.61.1, due to a heap-based buffer over-read in tool_msgs.c:voutf() that can cause information exposure and denial of service. In connected advisories, this flaw is addressed by upstream fixes and vendor advisories (e.g., upgrade to 7.62.0+ ...

CVE-2023-28321

CVE-2023-28321 affects curl before 8.1.0, where a private wildcard matching function used for TLS SAN wildcard patterns can mis-match IDN hostnames. IDNs are punycode-encoded (starting with xn--), but the curl wildcard check could still accept patterns like x* that should not match, potentially a...

CVE-2018-1000007

CVE-2018-1000007 affects curl/libcurl; it can leak HTTP authentication data when redirects occur. Root cause: libcurl may resend custom headers (e.g., Authorization) to hosts in a 30x redirect after sending to the initial URL. Connected advisories (e.g., CentOS/RHEL/CESA-2018:3157) confirm vulner...

CVE-2022-32207

CVE-2022-32207 affects curl: when saving cookies, alt-svc and HSTS data, the final rename can widen target file permissions, exposing updates to more users. Affected versions are curl before 7.84.0; remediation is to upgrade to 7.84.0 or newer (as indicated by multiple advisories).

CVE-2021-22926

CVE-2021-22926 affects curl/libcurl where using CURLOPT_SSLCERT can be spoofed when libcurl uses macOS Secure Transport. A writable current working directory attacker can cause the app to select a file-based cert over a named cert, resulting in the wrong client certificate being sent in TLS hands...