OESA-2026-4034 python-tornado security update

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived...

TencentOS Server 2: python-tornado (TSSA-2026:1040)

The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:1040 advisory. Package updates are available for TencentOS Server 2 that fix the following vulnerabilities...

SUSE CVE-2026-91991

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

CVE-2026-91991

A flaw was found in Tornado. An attacker can bypass security validation in the setcookie function by using capitalized or legacy keyword arguments. This allows the attacker to inject arbitrary cookie attributes, such as Domain or SameSite, and modify cookie security settings. The consequence is t...

CVE-2026-91991

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

UBUNTU-CVE-2026-91991

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

CVE-2026-91991

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

CVE-2026-91991

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

CVE-2026-91991 Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

CVE-2026-91991 Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

CVE-2026-91991

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

CVE-2026-91991

Tornado (Python web framework) versions before 6.5.8 contain an incomplete fix for cookie attribute injection in the set_cookie function. An attacker can pass capitalized or legacy keyword arguments (e.g., Domain, Path, SameSite) to embed semicolon-delimited data, bypassing validation and modifyi...

CVE-2026-91991 Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

CVE-2026-69211: Improper Neutralization of CRLF Sequences in HTTP Headers

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, ResponseCookie.render writes attacker-influenced name, content, domain, path, and extension values without neutralizing semicolons or control characters. An application that constructs a ResponseCookie from unvalidated...

CVE-2026-91991: Improper Neutralization of CRLF Sequences in HTTP Headers

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to setcookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or...

Linux Distros Unpatched Vulnerability : CVE-2026-91991

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalize...

SUSE CVE-2026-88038

cookies is a Node.js library for reading and writing HTTP cookies, used by Koa via ctx.cookies. In versions before 0.9.2 the library validates the cookie name and value against character sets that reject the semicolon separator, but the domain and path options are checked only against a permissiv...

CVE-2026-88038: Improper Neutralization of Special Elements in Output Used by a Downstream Component

cookies is a Node.js library for reading and writing HTTP cookies, used by Koa via ctx.cookies. In versions before 0.9.2 the library validates the cookie name and value against character sets that reject the semicolon separator, but the domain and path options are checked only against a permissiv...

Tornado: Incomplete fix for CVE-2026-35536: cookie attribute injection re-opened via the legacy case-insensitive `**kwargs` path in `set_cookie`

Summary The CVE-2026-35536 fix added a validation loop that rejects \x00-\x20\x3b\x7f, but only for the hardcoded lowercase keys name/domain/path/samesite. The still-live deprecated kwargs path writes attacker-supplied attribute values straight into the Morsel with no validation, and because...

GHSA-WWV5-G3V4-889X Tornado: Incomplete fix for CVE-2026-35536: cookie attribute injection re-opened via the legacy case-insensitive `**kwargs` path in `set_cookie`

Summary The CVE-2026-35536 fix added a validation loop that rejects \x00-\x20\x3b\x7f, but only for the hardcoded lowercase keys name/domain/path/samesite. The still-live deprecated kwargs path writes attacker-supplied attribute values straight into the Morsel with no validation, and because...