CVE-2026-35536 | tornadoweb Tornado up to 6.5.4 Attributes RequestHandler.set_cookie samesite invalid special elements (GHSA-78cv-mqj4-43f7)

VDB-355066 · CVE-2026-35536 · GHSA-78CV-MQJ4-43F7 TORNADOWEB TORNADO UP TO 6.5.4 ATTRIBUTES REQUESTHANDLER.SET_COOKIE SAMESITE INVALID SPECIAL ELEMENTS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.1 $0-$5k 1.08 Summaryinfo A vulnerability described as critical has been identified in tornadoweb Tornado up to 6.5.4. This affects the function RequestHandler.set_cookie of the component Attributes Handler. Executing a manipulation of the argument samesite can lead to improper handling of invalid use of special elements. This vulnerability is handled as CVE-2026-35536. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended. Detailsinfo A vulnerability was found in tornadoweb Tornado up to 6.5.4. It has been declared as critical. This vulnerability affects the function RequestHandler.set_cookie of the component Attributes Handler. The manipulation of the argument samesite with an unknown input leads to a improper handling of invalid use of special elements vulnerability. The CWE definition for the vulnerability is CWE-159. The product does not properly filter, remove, quote, or otherwise manage the invalid use of special elements in user-controlled input, which could cause adverse effect on its behavior and integrity. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters. The advisory is available at github.com. This vulnerability was named CVE-2026-35536 since 04/03/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. Upgrading to version 6.5.5 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Vendor tornadoweb Name Tornado Version 6.5.0 6.5.1 6.5.2 6.5.3 6.5.4 Website Product: https://github.com/tornadoweb/tornado/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.3 VulDB Meta Temp Score: 7.1 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.2 CNA Vector (MITRE): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Improper handling of invalid use of special elements CWE: CWE-159 / CWE-20 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Tornado 6.5.5 Timelineinfo 04/03/2026 Advisory disclosed 04/03/2026 +0 days CVE reserved 04/03/2026 +0 days VulDB entry created 04/03/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-78cv-mqj4-43f7 Status: Confirmed CVE: CVE-2026-35536 (🔒) GCVE (CVE): GCVE-0-2026-35536 GCVE (VulDB): GCVE-100-355066 Entryinfo Created: 04/03/2026 07:49 Changes: 04/03/2026 07:49 (67) Complete: 🔍 Cache ID: 99:503:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸