Session Fixation

Overview Affected versions of this package are vulnerable to Session Fixation through the CookieJar middleware accepting and storing a response cookie's Domain attribute without verifying that it matches the host that supplied the cookie or rejecting public suffixes. An attacker can cause cookies...

Session Fixation

Overview Affected versions of this package are vulnerable to Session Fixation through the CookieJar middleware accepting and storing a response cookie's Domain attribute without verifying that it matches the host that supplied the cookie or rejecting public suffixes. An attacker can cause cookies...

PT-2026-92406

When processing a Set-Cookie from a response, the CookieJar client middleware trusts the server-supplied Domain attribute verbatim, with no check that it domain-matches the host that sent the cookie RFC6265 §5.3 step 6 and no public suffix check. A malicious or compromised server can therefore...

CVE-2026-69214: Session Fixation

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware stores a response cookie’s Domain attribute without checking that it domain-matches the host that supplied the cookie or rejecting public suffixes. A malicious or compromised server...

Access Control Bypass

Overview Affected versions of this package are vulnerable to Access Control Bypass via improper handling of the Set-Cookie header when the Domain attribute matches a public suffix. An attacker can cause cookies to be sent to arbitrary sibling subdomains by setting a cookie with a domain scope tha...

CVE-2026-16729

A flaw was found in undici, where its setCookie function does not fully sanitize cookie attributes. A remote attacker could exploit this by providing specially crafted input to the domain or unparsed fields, leading to the injection of additional cookie attributes. This vulnerability can allow an...

undici: Undici: Cookie attribute injection allows bypassing security protections

A flaw was found in undici, where its setCookie function does not fully sanitize cookie attributes. A remote attacker could exploit this by providing specially crafted input to the domain or unparsed fields, leading to the injection of additional cookie attributes. This vulnerability can allow an...

Guzzle: Host-only cookie scope is not preserved

Impact In affected versions, CookieJar does not preserve whether a response cookie was set without a Domain attribute or with an empty one. A cookie without Domain is host-only and must be returned only to the exact host that set it. Under current cookie processing rules, an empty Domain value is...

CVE-2026-15076

In versions up to and including 4.5.29 4.x branch and 5.1.4 5.x branch, the WebClientSession component of Eclipse Vert.x Web Client does not validate that the Domain attribute of a Set-Cookie response header matches the originating server's domain, in violation of RFC 6265 section 5.3. An attacke...

Sensitive Cookie with Improper SameSite Attribute

Overview org.asynchttpclient:async-http-client is a maven plugin for the Async Http Client AHC classes. Affected versions of this package are vulnerable to Sensitive Cookie with Improper SameSite Attribute via ThreadSafeCookieStore in ThreadSafeCookieStore.add.... An attacker can plant a cookie f...

UBUNTU-CVE-2026-55688

The AsyncHttpClient AHC library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In versions from 2.0.0 prior to 2.16.0 and from 3.0.0.Beta1 prior to 3.0.11, ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without...

CVE-2026-55767

Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, CookieJar incorrectly accepts cookies with a dot-only Domain attribute and whitespace-padded variants. SetCookie::matchesDomain removes leading dots from the cookie domain, normalizing dot-only values to the empty string; SetCookie::valida...

CVE-2026-55767

Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, CookieJar incorrectly accepts cookies with a dot-only Domain attribute and whitespace-padded variants. SetCookie::matchesDomain removes leading dots from the cookie domain, normalizing dot-only values to the empty string; SetCookie::valida...

Dot-only cookie domains match all hosts

Impact CookieJar incorrectly accepts cookies with a dot-only Domain attribute, such as Domain=., Domain=.., Domain=..., and whitespace-padded variants such as Domain= . . In affected versions, SetCookie::matchesDomain removes leading dots from the cookie domain, normalizing dot-only values to the...

DEBIAN-CVE-2026-46625

JavaScript Cookie is a JavaScript API for handling cookies, client-side. Prior to version 3.0.7, js-cookie's internal assign helper copies properties with for...in + plain assignment. When the source object is produced by JSON.parse, the JSON object's "proto" member is an own enumerable property,...

tornado: Tornado: Cookie attribute injection due to improper handling of cookie arguments

A flaw was found in Tornado. A remote attacker could exploit this vulnerability by injecting specially crafted characters into the domain, path, and samesite arguments when setting cookies. This could lead to cookie attribute injection, potentially allowing for information disclosure or...

Python Library Tornado < 6.5.5 Multiple Vulnerabilities

The version of the Tornado Python library installed on the remote host is prior to 6.5.5. It is, therefore, affected by multiple vulnerabilities: - Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts i...

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

GHSA-78CV-MQJ4-43F7 Tornado has incomplete validation of cookie attributes

Values passed to the domain, path, and samesite arguments of RequestHandler.setcookie were not completely validated in versions of Tornado prior to 6.5.5. In particular, semicolons would be allowed, which could be used to inject attacker-controlled values for other cookie attributes...