CVE-2026-6634: Github.com/usememos/memos Memos Has An Incorrect Privilege Vulnerability

LOW
Advisory Identifier: GHSA-gqp3-hfc3-8q54
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CVSS 6.3
CWE-266
Published
Advisory Summary

CVE-2026-6634 is a LOW (CVSS 6.3) memos has an incorrect privilege vulnerability (CWE-266: Incorrect Privilege Assignment) affecting Github.com/usememos/memos libraries in the Go ecosystem. The issue involves memos has an incorrect privilege assignment issue. Remediation is available in the latest vendor maintenance releases.

CVE-2026-6634 at a Glance

CVE Identifier CVE-2026-6634
GHSA Identifier GHSA-gqp3-hfc3-8q54
Severity LOW
CVSS v3.1 Base Score 6.3
CWE Classification CWE-266: Incorrect Privilege Assignment
Affected Product Github.com/usememos/memos
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-6634

To remediate this vulnerability, upgrade all affected Github.com/usememos/memos dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/usememos/memos fixed: Latest secure release 
Upgrade github.com/usememos/memos to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/usememos/memos

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-6634, inspect your project dependencies for Github.com/usememos/memos:

inspect dependencies for github.com/usememos/memos

Analyze the terminal output to locate any version of Github.com/usememos/memos in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-266: Incorrect Privilege Assignment, where a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. In Github.com/usememos/memos, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A weakness has been identified in usememos memos up to 0.22.1. This affects the function memos_access_token of the file src/App.tsx of the component UpdateInstanceSetting. This manipulation of the argument additionalStyle/additionalScript causes improper authorization. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVE-2026-6634 Affected Github.com/usememos/memos Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
github.com/usememos/memos
golang/github.com/usememos/memos
Go
≤ 0.22.1

References

NVD — CVE-2026-6634 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6634
Github.com/usememos/memos Source Repository REPOSITORY
https://github.com/Dave-gilmore-aus/security-advisories/blob/main/usememos-security-advisory
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-gqp3-hfc3-8q54
Github.com/usememos/memos Source Repository REPOSITORY
https://github.com/usememos/memos
vuldb.com/submit/793432 WEB
https://vuldb.com/submit/793432
vuldb.com/vuln/358268 WEB
https://vuldb.com/vuln/358268
vuldb.com/vuln/358268/cti WEB
https://vuldb.com/vuln/358268/cti

Frequently Asked Questions

What is CVE-2026-6634?
CVE-2026-6634 is a security vulnerability in Github.com/usememos/memos involving Memos has an Incorrect Privilege Assignment issue under CWE-266: Incorrect Privilege Assignment.
Which Github.com/usememos/memos versions are affected?
Affected versions include releases prior to current release patches across affected packages: github.com/usememos/memos.
What version fixes CVE-2026-6634?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/usememos/memos affected?
Yes, github.com/usememos/memos is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-6634?
CVE-2026-6634 has a CVSS v3.1 base score of 6.3 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-6634?
CVE-2026-6634 is classified under CWE-266: Incorrect Privilege Assignment (A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.).
How can I check Go dependencies for CVE-2026-6634?
Run the dependency tree command: 'inspect dependencies for github.com/usememos/memos'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gqp3-hfc3-8q54",
  "modified" : "2026-07-21T14:49:02Z",
  "published" : "2026-04-20T12:32:01Z",
  "aliases" : [ "CVE-2026-6634" ],
  "summary" : "Memos has an Incorrect Privilege Assignment issue",
  "details" : "A weakness has been identified in usememos memos up to 0.22.1. This affects the function memos_access_token of the file src/App.tsx of the component UpdateInstanceSetting. This manipulation of the argument additionalStyle/additionalScript causes improper authorization. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/usememos/memos"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.22.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-6634"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Dave-gilmore-aus/security-advisories/blob/main/usememos-security-advisory"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-gqp3-hfc3-8q54"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/usememos/memos"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/793432"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/358268"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/358268/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-266" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-28T23:21:49Z",
    "nvd_published_at" : "2026-04-20T12:16:09Z"
  }
}