CVE-2026-54053

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.1%, top 37% 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
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.6Exploit: None knownExposed: 0

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

Many Notes is a Markdown note-taking web application designed for simplicity. Prior to 0.16.0, the ZIP vault import implemented in app/Actions/ProcessImportedVault.php accepts archive filenames containing parent-directory traversal segments. An authenticated user can write arbitrary files outside the importing user's vault and into other users' vaults, including overwriting existing files. Disguised SVG content can be placed in another user's vault and execute stored cross-site scripting when the victim opens that vault. This issue is fixed in version 0.16.0.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity96% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
63%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 24, 2026

Advisory Details (3)

Auto-updated Sep 22, 2026
Patch available. Sources: github, github_commit, github_release.
github Patch Available

Path Traversal via ZIP import allows arbitrary file write and stored XSS in other users' vaults · Advisory · brufdev/many-notes · GitHub

https://github.com/brufdev/many-notes/security/advisories/GHSA-wg8j-9c2g-xh6r
github_release Patch Available

v0.16.0

Patch available: brufdev/many-notes v0.16.0

https://github.com/brufdev/many-notes/releases/tag/v0.16.0
github_commit Patch Available

commit 1b3288fa9671 (brufdev/many-notes)

Patch available: brufdev/many-notes v0.16.0 (contains commit 1b3288fa9671)

https://github.com/brufdev/many-notes/commit/1b3288fa9671002e72e38b7fcd5d226673ba0cae

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 16× 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 21:25 UTCEG score recompute
  2. 2026-09-24 21:02 UTCEG score recompute
  3. 2026-09-24 14:14 UTCEG score recompute
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-23 19:39 UTCEG score recompute
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-22 17:40 UTCEG score recompute
  8. 2026-09-21 22:53 UTCEG score recompute
  9. 2026-09-20 20:55 UTCEG score recompute
  10. 2026-09-20 20:16 UTCEPSS rescore
  11. 2026-09-19 18:55 UTCEG score recompute
  12. 2026-09-18 20:37 UTCEG score recompute
  13. 2026-09-18 19:28 UTCEPSS rescore
  14. 2026-09-17 18:26 UTCEG score recompute
  15. 2026-09-17 17:20 UTCEG score recompute
  16. 2026-09-17 17:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54053?
CVE-2026-54053 is a critical vulnerability published on September 17, 2026. Many Notes is a Markdown note-taking web application designed for simplicity. Prior to 0.16.0, the ZIP vault import implemented in app/Actions/ProcessImportedVault.php accepts archive filenames containing parent-directory traversal segments. An authenticated user can write arbitrary files outside…
When was CVE-2026-54053 disclosed?
CVE-2026-54053 was first published in the National Vulnerability Database on September 17, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54053 actively exploited?
CVE-2026-54053 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 37.2% of all scored CVEs.
What is the CVSS score of CVE-2026-54053?
CVE-2026-54053 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-54053?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54053, 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.

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