CVE-2026-49453

Description

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, Joplin accepts synchronized resource metadata whose id or file_extension contains parent-directory or path-separator characters. BaseItem.unserialize() stores the unvalidated fields, resourceFilename() concatenates them into a destination path, and ResourceFetcher writes the attacker-controlled resource blob outside the resource directory during background synchronization. An attacker with write access to a configured sync target or shared notebook can create or overwrite files at an attacker-chosen existing path without user interaction. This issue is fixed in versions 3.6.15 and 3.7.2.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: HIGH
CVSS score: 7.0 / 10
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
Effective score: 7.0 / 10 HIGH source: CNA overview
CWE(s): CWE-20, CWE-22
Reserved: 2026-05-30
Published: 2026-09-21 20:50 UTC
Last updated: 2026-09-21 20:51 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/49xxx/CVE-2026-49453.json
Linked Threat: CVE-2026-49453 — Joplin: Path traversal in resource sync — silent arbitrary file write outside the resource directory

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-21 21:17:03 UTC
NVD last modified: 2026-09-21 21:17:03 UTC
NVD CVSS v3.1: 7.0 / 10 HIGH source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
Exploitability subscore: 2.2 / 10
Impact subscore: 4.7 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-84167
Assigner: GitHub_M
Published: Sep 21, 2026, 8:50:28 PM
Updated: Sep 22, 2026, 1:31:37 PM
EUVD base score (CVSS 3.1): 7.0 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
EUVD-reported EPSS: 0.0000
Vendors: laurent22
Products: joplin (< 3.6.15)

joplin (3.7.0, < 3.7.2)

ENISA description: Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, Joplin accepts synchronized resource metadata whose id or file_extension contains parent-directory or path-separator characters. BaseItem.unserialize() stores the unvalidated fields, resourceFilename() concatenates them into a destination path, and ResourceFetcher writes the attacker-controlled resource blob outside the resource directory during background synchronization. An attacker with write access to a configured sync target or shared notebook can create or overwrite files at an attacker-chosen existing path without user interaction. This issue is fixed in versions 3.6.15 and 3.7.2.

EUVD references (5)

Affected products (1)

Vendor	Product	Versions	Platforms
laurent22	joplin	`< 3.6.15` (affected), `>= 3.7.0, < 3.7.2` (affected)	—

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgf x_refsource_CONFIRM
https://github.com/laurent22/joplin/pull/15540 x_refsource_MISC
https://github.com/laurent22/joplin/pull/15672 x_refsource_MISC
https://github.com/laurent22/joplin/commit/18e0b08c282c89ae51612c4eff67af2a45ff5163 x_refsource_MISC
https://github.com/laurent22/joplin/commit/50518073740c4501058e366300b42c2f1925cb05 x_refsource_MISC

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/laurent22/joplin/commit/18e0b08c282c89ae51612c4eff67af2a45ff5163 security-advisories@github.com
https://github.com/laurent22/joplin/commit/50518073740c4501058e366300b42c2f1925cb05 security-advisories@github.com
https://github.com/laurent22/joplin/pull/15540 security-advisories@github.com
https://github.com/laurent22/joplin/pull/15672 security-advisories@github.com
https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgf security-advisories@github.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-22 16:48 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-22 16:48 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-22 16:48 UTC
SAP Security Patch Day - June 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-22 16:48 UTC
SAP Security Patch Day - May 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 12 th of May 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-22 16:48 UTC
CVE-2026-49453 - Joplin Path Traversal Vulnerability Allows…

web:vulmon.com

Vulnerability Summary Joplin versions prior to 3.6.15 and 3.7.2 allow an attacker with write access to a sync target or shared notebook to overwrite files at an attacker-chosen existing path. This occurs during background synchronization when the application accepts synchronized resource metadata containing parent-directory or path-separator characters. The unvalidated fields are stored and ...

2026-09-22 16:48 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-22 16:48 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-22 16:48 UTC
CVE-2026-49453: laurent22 joplin: Joplin is an open source ... - Rapid7

web:www.rapid7.com

CVE-2026-49453 : laurent22 joplin: Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. View severity, references, and remediation details from Rapid7.

2026-09-22 16:48 UTC
CVE-2026-49453 | Tenable®

web:www.tenable.com

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, Joplin accepts synchronized resource metadata whose id or file_extension contains parent-directory or path-separator characters. BaseItem.unserialize() stores the unvalidated fields, resourceFilename() concatenates them into a destination path, and ...

2026-09-22 16:48 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-49453.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "joplin",
          "vendor": "laurent22",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.6.15"
            },
            {
              "status": "affected",
              "version": ">= 3.7.0, < 3.7.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, Joplin accepts synchronized resource metadata whose id or file_extension contains parent-directory or path-separator characters. BaseItem.unserialize() stores the unvalidated fields, resourceFilename() concatenates them into a destination path, and ResourceFetcher writes the attacker-controlled resource blob outside the resource directory during background synchronization. An attacker with write access to a configured sync target or shared notebook can create or overwrite files at an attacker-chosen existing path without user interaction. This issue is fixed in versions 3.6.15 and 3.7.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-21T20:51:08.466Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgf",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgf"
        },
        {
          "name": "https://github.com/laurent22/joplin/pull/15540",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/laurent22/joplin/pull/15540"
        },
        {
          "name": "https://github.com/laurent22/joplin/pull/15672",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/laurent22/joplin/pull/15672"
        },
        {
          "name": "https://github.com/laurent22/joplin/commit/18e0b08c282c89ae51612c4eff67af2a45ff5163",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/laurent22/joplin/commit/18e0b08c282c89ae51612c4eff67af2a45ff5163"
        },
        {
          "name": "https://github.com/laurent22/joplin/commit/50518073740c4501058e366300b42c2f1925cb05",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/laurent22/joplin/commit/50518073740c4501058e366300b42c2f1925cb05"
        }
      ],
      "source": {
        "advisory": "GHSA-r24r-gp6h-cwgf",
        "discovery": "UNKNOWN"
      },
      "title": "Joplin: Path traversal in resource sync \u2014 silent arbitrary file write outside the resource directory"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-49453",
    "datePublished": "2026-09-21T20:50:28.455Z",
    "dateReserved": "2026-05-30T02:43:33.107Z",
    "dateUpdated": "2026-09-21T20:51:08.466Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}