CVE-2026-59814

HIGHPre-NVD 7.67.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 74% 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
Trending — 3 sources updated this weekElevated
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.6Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.7, Joplin Server's GET /shares/:id?resource_id= route serves a resource with the attacker-controlled mime value and omits Content-Disposition when the resource title is empty. A low-privileged user can publish an empty-title image/svg+xml attachment whose script executes when a victim opens the public share. By default, user content shares the Joplin Server application origin, allowing the script to access same-origin data and, when the victim is authenticated, perform actions with the victim's session, including reading administrative data and anti-CSRF tokens. Installations that configure USER_CONTENT_BASE_URL to a separate origin still execute the script, but on that separate user-content origin rather than the application origin. This issue is fixed in version 3.7.7.

CVSS v3
7.6
EG Score
7.6(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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 computed
Severity76% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

September 21, 2026

Last Modified

September 23, 2026

Advisory Details (3)

Auto-updated Sep 21, 2026
Patch available. Sources: github, github_pr, github_commit.
github_commit

commit 920cd8f463bf (laurent22/joplin)

Fix landed in laurent22/joplin commit 920cd8f463bf — awaiting tagged release

https://github.com/laurent22/joplin/commit/920cd8f463bf9bbce9daa07581676123007118e5
github_pr

Server: Harden user-content responses against XSS via uploaded resources

Fix merged in laurent22/joplin PR #15787 on 2026-06-28 — awaiting tagged release

https://github.com/laurent22/joplin/pull/15787
github Patch Available

Stored XSS via inline-served note attachment on published shares · Advisory · laurent22/joplin · GitHub

https://github.com/laurent22/joplin/security/advisories/GHSA-mx98-7h4g-6gmh

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× 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.

  1. 2026-09-24 21:28 UTCEG score recompute
  2. 2026-09-24 14:04 UTCEPSS rescore
  3. 2026-09-23 18:39 UTCEG score recompute
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 03:25 UTCEG score recompute
  6. 2026-09-22 14:20 UTCEG score recompute
  7. 2026-09-22 13:36 UTCEG score recompute
  8. 2026-09-21 22:27 UTCEG score recompute
  9. 2026-09-21 21:27 UTCEG score recompute
  10. 2026-09-21 21:26 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59814?
CVE-2026-59814 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 3.7.7, Joplin Server's GET /shares/:id?resourceid= route serves a resource with the attacker-controlled mime value and omits Content-Disposition when the resource title is empty. A…
When was CVE-2026-59814 disclosed?
CVE-2026-59814 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-2026-59814 actively exploited?
CVE-2026-59814 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 74.1% of all scored CVEs.
What is the CVSS score of CVE-2026-59814?
CVE-2026-59814 has a CVSS v3 base score of 7.6 (NVD).
How do I remediate CVE-2026-59814?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59814, 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

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