CVE-2026-42874

Microdot is a minimalistic Python web framework. Prior to 2.6.1, the Response.setcookie method does not sanitize its string arguments, and in particular will not detect the presence of the \r\n sequence in them. This can be a potential source of header injection attacks. For a header injection...

Unity Linux 20.1070e Security Update: future (UTSA-2026-017344)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017344 advisory. An issue discovered in Python Charmers Future 0.18.2 and earlier allows remote attackers to cause a denial of service via crafted Set-Cookie header from malicious we...

HTTP Response Splitting

Overview microdot is a The impossibly small web framework for MicroPython Affected versions of this package are vulnerable to HTTP Response Splitting in the setcookie function. An attacker can inject arbitrary HTTP headers by supplying malicious input containing carriage return and line feed...

JLSEC-2026-392

A malicious server can serve excessive amounts of Set-Cookie: headers in a HTTP response to curl and curl 7.84.0 stores all of them. A sufficiently large amount of big cookies make subsequent HTTP requests to this, or other servers to which the cookies match, create requests that become larger th...

Amazon Linux 2023 : python3.13-tornado (ALAS2023-2026-1588)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1588 advisory. In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters. CVE-2026-35536...

Amazon Linux 2023 : python3-tornado (ALAS2023-2026-1587)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1587 advisory. In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters. CVE-2026-35536...

curl: CVE-2026-6276: stale custom cookie host causes cookie leak

Summary: libcurl keeps a stale data-state.aptr.cookiehost after a request that uses a custom Host: header. On later requests on the same easy handle, when no custom Host: is used, libcurl still reuses that stale value for outgoing cookie selection lib/http.c:2560-2563 and incoming Set-Cookie...

HTTP Response Splitting

Overview org.webjars.npm:hono is an Ultrafast web framework for the Edges Affected versions of this package are vulnerable to HTTP Response Splitting via the setCookie function. An attacker can cause runtime errors and potentially disrupt application behavior by supplying specially crafted input ...

SUSE CVE-2026-35536

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters...

GHSA-FQWM-6JPJ-5WXC Tornado has cookie attribute injection via .RequestHandler.set_cookie

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters...

PYSEC-2026-2287

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters...

PYSEC-2026-2287

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters...

CVE-2026-35536

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters...

CVE-2026-35536

Tornado

CVE-2026-35536

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters...

CVE-2026-35536

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.setcookie were not checked for crafted characters...

curl: Cookie attribute TAB injection regression in Set-Cookie parsing

Overview | | | |---|---| | Component | lib/cookie.c — parsecookieheader | | Type | Security regression incomplete input validation | | CWE | CWE-20 Improper Input Validation | | Severity | LOW CVSS 3.1 estimated 3.7, comparable to CVE-2022-35252 | | Affected | curl 8.18.0 through current HEAD | |...

Buffer Overflow

Overview Affected versions of this package are vulnerable to Buffer Overflow via the setcookiegeneratecallback function. An attacker can cause a buffer overflow by providing a callback that returns a cookie value greater than 256 bytes. Note: This is only exploitable if the application explicitly...

CVE-2026-29086

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie utility did not validate semicolons ;, carriage returns \r, or newline characters \n in the domain and path options when constructing the Set-Cookie header. Because cookie...

CVE-2026-29086

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie utility did not validate semicolons ;, carriage returns \r, or newline characters \n in the domain and path options when constructing the Set-Cookie header. Because cookie...