CVE-2026-73417

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 56% 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
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.6Exploit: None knownExposed: 0

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

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 3.3.0 until 4.5.10 and 4.6.2, JupyterLab allows notebook settings to be shared and applied through an overrides.json file using the Import button in the Settings Editor. In packages/notebook-extension/schema/tracker.json and packages/notebook-extension/src/index.ts, the sideBySideLeftMarginOverride and sideBySideRightMarginOverride settings are not properly validated before being inserted into style content, allowing a crafted settings file to contain instructions that execute as code instead of only changing display preferences. A user can import the malicious file, or an attacker with access to a shared settings location can plant an overrides.json that is applied automatically. The embedded code runs with the affected user's access and can read or modify notebooks and files and run code through the notebook server, including on a connected kernel. This issue is fixed in versions 4.5.10 and 4.6.2.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity86% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

July 22, 2026

Last Modified

August 14, 2026

Advisory Details (10)

Auto-updated Aug 13, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

Cross-site scripting (XSS) in JupyterLab via crafted settings file (`overrides.json`) · Advisory · jupyterlab/jupyterlab · GitHub

https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-pppj-hq3g-57pj
github_release Patch Available

v4.7.0a1

Patch available: jupyterlab/jupyterlab v4.7.0a1 (pre-release)

https://github.com/jupyterlab/jupyterlab/releases/tag/v4.7.0a1
github_release Patch Available

v4.6.2

Patch available: jupyterlab/jupyterlab v4.6.2

https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.2
github_release Patch Available

v4.5.10

Patch available: jupyterlab/jupyterlab v4.5.10

https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.10
github_pr

Backport of security patches to `4.5.x` branch

Fix merged in jupyterlab/jupyterlab PR #19186 on 2026-07-21 — awaiting tagged release

https://github.com/jupyterlab/jupyterlab/pull/19186
github_pr

Backport of security patches to `4.6.x` branch

Fix merged in jupyterlab/jupyterlab PR #19185 on 2026-07-21 — awaiting tagged release

https://github.com/jupyterlab/jupyterlab/pull/19185
github_pr

Security patches

Fix merged in jupyterlab/jupyterlab PR #19184 on 2026-07-21 — awaiting tagged release

https://github.com/jupyterlab/jupyterlab/pull/19184
github_commit

commit f1beab4a2027 (jupyterlab/jupyterlab)

Fix landed in jupyterlab/jupyterlab commit f1beab4a2027 — awaiting tagged release

https://github.com/jupyterlab/jupyterlab/commit/f1beab4a2027af4719d6edc07d52d6cf5a39a432
github_commit

commit be9303f5bcd5 (jupyterlab/jupyterlab)

Fix landed in jupyterlab/jupyterlab commit be9303f5bcd5 — awaiting tagged release

https://github.com/jupyterlab/jupyterlab/commit/be9303f5bcd5308eaeae953c5a3c903046682c2c
github_commit

commit 9365f020baec (jupyterlab/jupyterlab)

Fix landed in jupyterlab/jupyterlab commit 9365f020baec — awaiting tagged release

https://github.com/jupyterlab/jupyterlab/commit/9365f020baec5221deaf11535ed554c06637c999

Vendor Advisories for CVE-2026-73417(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
jupyterlab4.6.0, 4.6.14.6.2—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 29× 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. 2026-08-25 17:48 UTCEG score recompute
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-24 18:19 UTCEG score recompute
  4. 2026-08-23 07:57 UTCEG score recompute
  5. 2026-08-23 00:19 UTCEPSS rescore
  6. 2026-08-22 09:02 UTCEG score recompute
  7. 2026-08-21 23:49 UTCEPSS rescore
  8. 2026-08-21 10:03 UTCEG score recompute
  9. 2026-08-20 22:56 UTCEPSS rescore
  10. 2026-08-19 23:42 UTCEG score recompute
  11. 2026-08-19 17:04 UTCEPSS rescore
  12. 2026-08-19 00:44 UTCEG score recompute
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 13:49 UTCEPSS rescore
  15. 2026-08-17 14:20 UTCEG score recompute
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-16 15:25 UTCEG score recompute
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 03:58 UTCEG score recompute
  21. 2026-08-16 02:15 UTCEPSS rescore
  22. 2026-08-15 05:04 UTCEG score recompute
  23. 2026-08-15 01:31 UTCEPSS rescore
  24. 2026-08-14 17:36 UTCEG score recompute
  25. 2026-08-14 16:30 UTCEG score recompute
Show 4 more
  1. 2026-08-13 22:25 UTCEG score recompute
  2. 2026-08-13 22:09 UTCEG score recompute▲ 8.60
  3. 2026-08-13 22:09 UTCMITRE cvelistV5CVSS v3 → 8.6 · CVSS v4 → 8.6
  4. 2026-08-12 20:21 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73417?
CVE-2026-73417 is a high vulnerability published on July 22, 2026. jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 3.3.0 until 4.5.10 and 4.6.2, JupyterLab allows notebook settings to be shared and applied through an overrides.json file using the Import button in the Settings…
When was CVE-2026-73417 disclosed?
CVE-2026-73417 was first published in the National Vulnerability Database on July 22, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73417 actively exploited?
CVE-2026-73417 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.3% of all scored CVEs.
What is the CVSS score of CVE-2026-73417?
CVE-2026-73417 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-73417?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73417, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-73417

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