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.
CVE-2026-49453
HIGHPre-NVD 7.07.0—Trending — 3 sources updated this weekElevated
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 68% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.0Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.0
- EG Score
- 7.0(medium)
- EG Risk
- 48(Track)EG Risk 48/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity70% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 32%
- KEV
- Not listed
Published
September 21, 2026
Last Modified
September 23, 2026
Advisory Details (5)
Auto-updated Sep 21, 2026🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github.
github Patch Available🟡 PoC Available
Path traversal in resource sync — silent arbitrary file write outside the resource directory · Advisory · laurent22/joplin · GitHub
https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgfgithub_pr
All: Improve how resource filenames are determined
Fix merged in laurent22/joplin PR #15672 on 2026-06-12 — awaiting tagged release
https://github.com/laurent22/joplin/pull/15672github_pr
All: Reject malformed item IDs during sync
Fix merged in laurent22/joplin PR #15540 on 2026-06-20 — awaiting tagged release
https://github.com/laurent22/joplin/pull/15540github_commit
commit 50518073740c (laurent22/joplin)
Fix landed in laurent22/joplin commit 50518073740c — awaiting tagged release
https://github.com/laurent22/joplin/commit/50518073740c4501058e366300b42c2f1925cb05github_commit
commit 18e0b08c282c (laurent22/joplin)
Fix landed in laurent22/joplin commit 18e0b08c282c — awaiting tagged release
https://github.com/laurent22/joplin/commit/18e0b08c282c89ae51612c4eff67af2a45ff5163Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 9× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-24 20:36 UTCEG score recompute
- 2026-09-23 18:39 UTCEG score recompute
- 2026-09-23 17:53 UTCEPSS rescore
- 2026-09-23 03:19 UTCEG score recompute
- 2026-09-22 14:20 UTCEG score recompute
- 2026-09-22 13:36 UTCEG score recompute
- 2026-09-21 21:22 UTCEG score recompute
- 2026-09-21 20:58 UTCEG score recompute
- 2026-09-21 20:57 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-49453?
CVE-2026-49453 is a high vulnerability published on September 21, 2026. 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…
When was CVE-2026-49453 disclosed?
CVE-2026-49453 was first published in the National Vulnerability Database on September 21, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49453 actively exploited?
CVE-2026-49453 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.6% of all scored CVEs.
What is the CVSS score of CVE-2026-49453?
CVE-2026-49453 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2026-49453?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49453, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-49453
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