CVE-2026-6634 | usememos up to 0.22.1 UpdateInstanceSetting src/App.tsx memos_access_token additionalStyle/additionalScript improper authorization

VDB-358268 · SUBMIT #793432 · CVE-2026-6634 USEMEMOS UP TO 0.22.1 UPDATEINSTANCESETTING SRC/APP.TSX MEMOS_ACCESS_TOKEN ADDITIONALSTYLE/ADDITIONALSCRIPT IMPROPER AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI Summaryinfo A vulnerability categorized as critical has been discovered in usememos memos up to 0.22.1. This impacts the function memos_access_token of the file src/App.tsx of the component UpdateInstanceSetting. Such manipulation of the argument additionalStyle/additionalScript leads to improper authorization. This vulnerability is listed as CVE-2026-6634. The attack may be performed from remote. In addition, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way. Detailsinfo A vulnerability was found in usememos memos up to 0.22.1 and classified as critical. Affected by this issue is the function memos_access_token of the file src/App.tsx of the component UpdateInstanceSetting. The manipulation of the argument additionalStyle/additionalScript with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-6634. The exploitation is known to be easy. The attack may be launched remotely. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1548.002. The exploit is available at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor usememos Name memos Version 0.22.0 0.22.1 License open-source CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 5.7 VulDB Base Score: 6.3 VulDB Temp Score: 5.7 VulDB Vector: 🔒 VulDB Reliability: 🔍 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 authorization CWE: CWE-285 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 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: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/19/2026 Advisory disclosed 04/19/2026 +0 days VulDB entry created 04/19/2026 +0 days VulDB entry last update Sourcesinfo Advisory: github.com Status: Not defined CVE: CVE-2026-6634 (🔒) GCVE (CVE): GCVE-0-2026-6634 GCVE (VulDB): GCVE-100-358268 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/19/2026 21:22 Changes: 04/19/2026 21:22 (58) Complete: 🔍 Submitter: davidgilmore Cache ID: 99:17E:101 Submitinfo Accepted Submit #793432: Usememos Memos 0.22.1 Cross Site Scripting (by davidgilmore) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸